  3.321   2.557   0.0162 *
## wt             3.884      3.798   1.023   0.3153  
## drat:wt       -2.543      1.093  -2.327   0.0274 *
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## Residual standard error: 2.839 on 28 degrees of freedom
## Multiple R-squared:  0.7996, Adjusted R-squared:  0.7782 
## F-statistic: 37.25 on 3 and 28 DF,  p-value: 6.567e-10</code></pre>
<p>Clearly the models produce radically different estimates and goodness-of-fit to the original data. As a re