="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/stats/lm.html" class="external-link">lm</a></span><span class="op">(</span><span class="va">IQ</span> <span class="op">~</span> <span class="va">height</span> <span class="op">+</span> <span class="va">weight</span> <span class="op">+</span> <span class="va">age</span> <span class="op">+</span> <span class="va">male</span>, data<span class="op">=</span><span class="va">class2</span><span class="op">)</span></span>
<span><span class="fu"><a href=