an class='op'>)</span><span class='op'>[</span><span class='op'>-</span><span class='fl'>1</span>,<span class='op'>]</span>

<span class='fu'><a href='https://rdrr.io/pkg/raster/man/plot.html'>plot</a></span><span class='op'>(</span><span class='va'>dat</span><span class='op'>$</span><span class='va'>DogAge</span>, <span class='va'>dat</span><span class='op'>$</span><span class='va'>HumanAge</span>, <span class='st'>"l"</span>,
     main<span class='op'>=</span><span class='st'>"Canine-Human Age Equivalence