ass="kw">lm</span>(mpg <span class="op">~</span><span class="st"> </span>wt <span class="op">+</span><span class="st"> </span><span class="kw">I</span>(wt<span class="op">^</span><span class="dv">2</span>), <span class="dt">data =</span> mtcars)
<span class="kw">summary</span>(x)</code></pre></div>
<pre><code>## 
## Call:
## lm(formula = mpg ~ wt + I(wt^2), data = mtcars)
## 
## Residuals:
##    Min     1Q Median     3Q    Max 
## -3.483 -1.998 -0.773  1.462  6.238 
## 
## Coefficients:
##             Estim