title: How to plot quadratic regression in R?
body: <p>The following code generates a qudaratic regression in R.</p>
  
  <pre><code> lm.out3 = lm(listOfDataFrames1$avgTime ~ listOfDataFrames1$betaexit + I(listOfDataFrames1$betaexit^2) + I(listOfDataFrames1$betaexit^3))
  
   summary(lm.out3)
  
  Call:
  lm(formula = listOfDataFrames1$avgTime ~ listOfDataFrames1$betaexit + 
      I(listOfDataFrames1$betaexit^2) + I(listOfDataFrames1$betaexit^3))
  
  Residuals:
      Min      1Q  Median      3Q     Max 
  -14.168  -2.923  -1.435   2.459  28.429 
  
  Coefficients:
                                   Estimate Std. Error t value Pr(&gt;|t|)    
  (Intercept)                        199.41      11.13  17.913  &lt; 2e-16 ***
  listOfDataFrames1$betaexit       -3982.03     449.49  -8.859 1.14e-12 ***
  I(listOfDataFrames1$betaexit^2)  32630.86    5370.27   6.076 7.87e-08 ***
  I(listOfDataFrames1$betaexit^3) -93042.90   19521.05  -4.766 1.15e-05 ***
  ---
  Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
  
  Residual standard error: 7.254 on 63 degrees of freedom
  Multiple R-squared:  0.9302,    Adjusted R-squared:  0.9269 
  F-statistic: 279.8 on 3 and 63 DF,  p-value: &lt; 2.2e-16
  </code></pre>
  
  <p>But how to do I plot the curve on the graph am confused.</p>
  
  <p>To get graph:</p>
  
  <pre><code> plot(listOfDataFrames1$avgTime~listOfDataFrames1$betaexit)
  </code></pre>
  
  <p>But curve?</p>
  
  <hr>
  
  <p>Is there any to do it without manually copying the values?
  Like mso suggested though it works.</p>