riables</h3>
<p>Explanatory variables can be either quantitative or categorical. With two explanatory variables, one is mapped to x and the other to color. Given that the response variable is always mapped to y, there are four combinations possible, each of which has a distinctive graphical format:</p>
<table class="caption-top table">
<thead>
<tr class="header">
<th>Example</th>
<th>Horizontal axis (x)</th>
<th>Color</th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td><a href="#fig-cat-cat" class="quarto-xref