Create a (Speed)2 term (called Speed Sq) and incorporate that term into your regression model to predict MPG MPG 0 1(Speed) 2(Displacement) 3(Speed Sq) a What are the regression equation and R2 value b Look at residual versus Speed and residual versus Displacement plots Describe any changes when (S...

a The regression equation is mpg 423 0278 speed 315 displacement 000183 S ...

Create a (Speed)2 term (called Speed Sq) and incorporate that term into your regression model to predict

Question:

Create a (Speed)2 term (called Speed Sq) and incorporate that term into your regression model to predict MPG: MPG = β0 + β1(Speed) + β2(Displacement) + β3(Speed Sq).
a. What are the regression equation and R2 value?
b. Look at residual versus Speed and residual versus Displacement plots. Describe any changes when (Speed)2 is added to the model.
c. What does the residual normal probability plot show?