diff --git a/404.html b/404.html
index 48ab9f6..ef05e6c 100644
--- a/404.html
+++ b/404.html
@@ -263,8 +263,8 @@ <h1>Page not found</h1>
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   "identifier": "https://lorhzy09.github.io/regression-in-ML/404.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
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diff --git a/CODE_OF_CONDUCT.html b/CODE_OF_CONDUCT.html
index 89c8385..33ae0f9 100644
--- a/CODE_OF_CONDUCT.html
+++ b/CODE_OF_CONDUCT.html
@@ -295,7 +295,7 @@ <h1>Contributor Code of Conduct</h1>
   "identifier": "https://lorhzy09.github.io/regression-in-ML/CODE_OF_CONDUCT.html",
   "dateCreated": "2003-07-17",
   "dateModified": "2023-11-21",
-  "datePublished": "2024-01-09"
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/Introducing Regression Models.html b/Introducing Regression Models.html
index 8680da4..b964c4b 100644
--- a/Introducing Regression Models.html	
+++ b/Introducing Regression Models.html	
@@ -318,7 +318,7 @@ <h3 class="callout-title">SLR in Action?<a class="anchor" aria-label="anchor" hr
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1">Possible Ideas:</h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <ul><li>Predict film revenue based on their ratings</li>
 <li>Predict wine price by its date</li>
@@ -349,7 +349,7 @@ <h3 class="callout-title">Challenge<a class="anchor" aria-label="anchor" href="#
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Ratings might be seen as <span class="math inline">\(X\)</span>, our
 explanatory variable, and revenue as <span class="math inline">\(Y\)</span>, the dependent variable. We could
@@ -441,7 +441,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://lorhzy09.github.io/regression-in-ML/Introducing Regression Models.html",
   "dateCreated": "2003-07-17",
   "dateModified": "2023-11-21",
-  "datePublished": "2024-01-09"
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/LICENSE.html b/LICENSE.html
index 22bcefc..0669cc4 100644
--- a/LICENSE.html
+++ b/LICENSE.html
@@ -346,7 +346,7 @@ <h1>Licenses</h1>
   "identifier": "https://lorhzy09.github.io/regression-in-ML/LICENSE.html",
   "dateCreated": "2003-07-17",
   "dateModified": "2023-11-21",
-  "datePublished": "2024-01-09"
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/aio.html b/aio.html
index 0d7ed67..37cdfc6 100644
--- a/aio.html
+++ b/aio.html
@@ -340,7 +340,7 @@ <h3 class="callout-title">SLR in Action?<a class="anchor" aria-label="anchor" hr
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1">Possible Ideas:</h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <ul>
 <li>Predict film revenue based on their ratings</li>
@@ -374,7 +374,7 @@ <h3 class="callout-title">Challenge<a class="anchor" aria-label="anchor" href="#
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Ratings might be seen as <span class="math inline">\(X\)</span>, our
 explanatory variable, and revenue as <span class="math inline">\(Y\)</span>, the dependent variable. We could
@@ -456,8 +456,8 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "identifier": "https://lorhzy09.github.io/regression-in-ML/aio.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/images.html b/images.html
index 73f5e91..164c370 100644
--- a/images.html
+++ b/images.html
@@ -293,8 +293,8 @@ <h2 class="accordion-header" id="flush-headingTwelve">
   "url": "https://lorhzy09.github.io/regression-in-ML/images.html",
   "identifier": "https://lorhzy09.github.io/regression-in-ML/images.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
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   </script><script>
diff --git a/index.html b/index.html
index b8a557f..0062375 100644
--- a/index.html
+++ b/index.html
@@ -257,7 +257,7 @@ <h3 class="callout-title">Details<a class="anchor" aria-label="anchor" href="#de
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1">Windows</h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>Use PuTTY</p>
 </div>
@@ -269,7 +269,7 @@ <h4 class="accordion-header" id="headingSolution1">Windows</h4>
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   <h4 class="accordion-header" id="headingSolution2">MacOS</h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>Use Terminal.app</p>
 </div>
@@ -281,7 +281,7 @@ <h4 class="accordion-header" id="headingSolution2">MacOS</h4>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3">Linux</h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>Use Terminal</p>
 </div>
@@ -341,8 +341,8 @@ <h4 class="accordion-header" id="headingSolution3">Linux</h4>
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   "identifier": "https://lorhzy09.github.io/regression-in-ML/index.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/instructor-notes.html b/instructor-notes.html
index 5ea66a9..0833f44 100644
--- a/instructor-notes.html
+++ b/instructor-notes.html
@@ -300,8 +300,8 @@ <h1>Instructor Notes</h1>
   "url": "https://lorhzy09.github.io/regression-in-ML/instructor-notes.html",
   "identifier": "https://lorhzy09.github.io/regression-in-ML/instructor-notes.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
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   </script><script>
diff --git a/instructor/404.html b/instructor/404.html
index 154b4e5..0bda242 100644
--- a/instructor/404.html
+++ b/instructor/404.html
@@ -263,8 +263,8 @@ <h1>Page not found</h1>
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   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/instructor/CODE_OF_CONDUCT.html b/instructor/CODE_OF_CONDUCT.html
index 77ee977..804b93c 100644
--- a/instructor/CODE_OF_CONDUCT.html
+++ b/instructor/CODE_OF_CONDUCT.html
@@ -297,7 +297,7 @@ <h1>Contributor Code of Conduct</h1>
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   "dateCreated": "2003-07-17",
   "dateModified": "2023-11-21",
-  "datePublished": "2024-01-09"
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diff --git a/instructor/Introducing Regression Models.html b/instructor/Introducing Regression Models.html
index 2a10461..8819577 100644
--- a/instructor/Introducing Regression Models.html	
+++ b/instructor/Introducing Regression Models.html	
@@ -320,7 +320,7 @@ <h3 class="callout-title">SLR in Action?<a class="anchor" aria-label="anchor" hr
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1">Possible Ideas:</h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <ul><li>Predict film revenue based on their ratings</li>
 <li>Predict wine price by its date</li>
@@ -351,7 +351,7 @@ <h3 class="callout-title">Challenge<a class="anchor" aria-label="anchor" href="#
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Ratings might be seen as <span class="math inline">\(X\)</span>, our
 explanatory variable, and revenue as <span class="math inline">\(Y\)</span>, the dependent variable. We could
@@ -443,7 +443,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://lorhzy09.github.io/regression-in-ML/instructor/Introducing Regression Models.html",
   "dateCreated": "2003-07-17",
   "dateModified": "2023-11-21",
-  "datePublished": "2024-01-09"
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/instructor/LICENSE.html b/instructor/LICENSE.html
index 441e349..250cea4 100644
--- a/instructor/LICENSE.html
+++ b/instructor/LICENSE.html
@@ -348,7 +348,7 @@ <h1>Licenses</h1>
   "identifier": "https://lorhzy09.github.io/regression-in-ML/instructor/LICENSE.html",
   "dateCreated": "2003-07-17",
   "dateModified": "2023-11-21",
-  "datePublished": "2024-01-09"
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/instructor/aio.html b/instructor/aio.html
index b82c03b..221a36b 100644
--- a/instructor/aio.html
+++ b/instructor/aio.html
@@ -343,7 +343,7 @@ <h3 class="callout-title">SLR in Action?<a class="anchor" aria-label="anchor" hr
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   <h4 class="accordion-header" id="headingSolution1">Possible Ideas:</h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <ul>
 <li>Predict film revenue based on their ratings</li>
@@ -377,7 +377,7 @@ <h3 class="callout-title">Challenge<a class="anchor" aria-label="anchor" href="#
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   <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Ratings might be seen as <span class="math inline">\(X\)</span>, our
 explanatory variable, and revenue as <span class="math inline">\(Y\)</span>, the dependent variable. We could
@@ -459,8 +459,8 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "url": "https://lorhzy09.github.io/regression-in-ML/instructor/aio.html",
   "identifier": "https://lorhzy09.github.io/regression-in-ML/instructor/aio.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/instructor/images.html b/instructor/images.html
index 82149b1..66ac932 100644
--- a/instructor/images.html
+++ b/instructor/images.html
@@ -295,8 +295,8 @@ <h2 class="accordion-header" id="flush-headingTwelve">
   "url": "https://lorhzy09.github.io/regression-in-ML/instructor/images.html",
   "identifier": "https://lorhzy09.github.io/regression-in-ML/instructor/images.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/instructor/index.html b/instructor/index.html
index 70d0676..9cbfdfb 100644
--- a/instructor/index.html
+++ b/instructor/index.html
@@ -274,7 +274,7 @@ <h3 class="callout-title">Details<a class="anchor" aria-label="anchor" href="#de
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1">Windows</h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>Use PuTTY</p>
 </div>
@@ -286,7 +286,7 @@ <h4 class="accordion-header" id="headingSolution1">Windows</h4>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2">MacOS</h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>Use Terminal.app</p>
 </div>
@@ -298,7 +298,7 @@ <h4 class="accordion-header" id="headingSolution2">MacOS</h4>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3">Linux</h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>Use Terminal</p>
 </div>
@@ -358,8 +358,8 @@ <h4 class="accordion-header" id="headingSolution3">Linux</h4>
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   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/instructor/instructor-notes.html b/instructor/instructor-notes.html
index fd8320d..22159f3 100644
--- a/instructor/instructor-notes.html
+++ b/instructor/instructor-notes.html
@@ -303,8 +303,8 @@ <h1>Instructor Notes</h1>
   "url": "https://lorhzy09.github.io/regression-in-ML/instructor/instructor-notes.html",
   "identifier": "https://lorhzy09.github.io/regression-in-ML/instructor/instructor-notes.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/instructor/key-points.html b/instructor/key-points.html
index 56ae7f3..351e42c 100644
--- a/instructor/key-points.html
+++ b/instructor/key-points.html
@@ -304,8 +304,8 @@ <h2 class="accordion-header" id="flush-headingTwelve">
   "url": "https://lorhzy09.github.io/regression-in-ML/instructor/key-points.html",
   "identifier": "https://lorhzy09.github.io/regression-in-ML/instructor/key-points.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/instructor/profiles.html b/instructor/profiles.html
index e30ae22..0bcd83e 100644
--- a/instructor/profiles.html
+++ b/instructor/profiles.html
@@ -248,8 +248,8 @@ <h1>Learner Profiles</h1>
   "url": "https://lorhzy09.github.io/regression-in-ML/instructor/profiles.html",
   "identifier": "https://lorhzy09.github.io/regression-in-ML/instructor/profiles.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/instructor/reference.html b/instructor/reference.html
index 4987bcf..a143971 100644
--- a/instructor/reference.html
+++ b/instructor/reference.html
@@ -290,7 +290,7 @@ <h1>Reference</h1>
   "identifier": "https://lorhzy09.github.io/regression-in-ML/instructor/reference.html",
   "dateCreated": "2003-07-17",
   "dateModified": "2023-11-21",
-  "datePublished": "2024-01-09"
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/key-points.html b/key-points.html
index 0ed9951..9edb599 100644
--- a/key-points.html
+++ b/key-points.html
@@ -302,8 +302,8 @@ <h2 class="accordion-header" id="flush-headingTwelve">
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   "identifier": "https://lorhzy09.github.io/regression-in-ML/key-points.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/pkgdown.yml b/pkgdown.yml
index 3f75343..159fb53 100644
--- a/pkgdown.yml
+++ b/pkgdown.yml
@@ -2,5 +2,5 @@ pandoc: 2.19.2
 pkgdown: 2.0.7
 pkgdown_sha: ~
 articles: {}
-last_built: 2024-01-09T01:18Z
+last_built: 2024-01-16T01:18Z
 
diff --git a/profiles.html b/profiles.html
index 51037d0..3a167aa 100644
--- a/profiles.html
+++ b/profiles.html
@@ -248,8 +248,8 @@ <h1>Learner Profiles</h1>
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   "identifier": "https://lorhzy09.github.io/regression-in-ML/profiles.html",
   "dateCreated": "2003-07-17",
-  "dateModified": "2024-01-09",
-  "datePublished": "2024-01-09"
+  "dateModified": "2024-01-16",
+  "datePublished": "2024-01-16"
 }
 
   </script><script>
diff --git a/reference.html b/reference.html
index 8d1e61f..2ad5ef6 100644
--- a/reference.html
+++ b/reference.html
@@ -288,7 +288,7 @@ <h1>Reference</h1>
   "identifier": "https://lorhzy09.github.io/regression-in-ML/reference.html",
   "dateCreated": "2003-07-17",
   "dateModified": "2023-11-21",
-  "datePublished": "2024-01-09"
+  "datePublished": "2024-01-16"
 }
 
   </script><script>