"anchor" aria-label="anchor" href="#code-box-13-1-linear-models-of-the-brain-size-body-size-data"></a>
</h2>
<div class="sourceCode" id="cb1"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="kw"><a href="https://rdrr.io/r/base/library.html" class="external-link">library</a></span><span class="op">(</span><span class="va"><a href="http://www.stats.ox.ac.uk/pub/MASS4/" class="external-link">MASS</a></span><span class="op">)</span></span>
<span><span class="fu"><a href="https://