re class="sourceCode r"><code class="sourceCode r"><span class="kw">summary</span>(<span class="kw">lm</span>(mpg <span class="op">~</span><span class="st"> </span>drat<span class="op">:</span>wt, <span class="dt">data =</span> mtcars))</code></pre></div>
<pre><code>## 
## Call:
## lm(formula = mpg ~ drat:wt, data = mtcars)
## 
## Residuals:
##     Min      1Q  Median      3Q     Max 
## -7.3319 -2.3669 -0.6585  2.0952  8.2124 
## 
## Coefficients:
##             Estimate Std. Error t value Pr(&gt;|t|)    
