><span class="op">)</span>, lty <span class="op">=</span> <span class="fl">2</span>, col <span class="op">=</span> <span class="st">"red"</span><span class="op">)</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/graphics/abline.html" class="external-link">abline</a></span><span class="op">(</span>h <span class="op">=</span> <span class="fl">1</span>, lty <span class="op">=</span> <span class="fl">2</span><span class="op">)</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/graphi