Whenever x1 and x2 are uncorrelated, then R2 for the model E(y) = +1x1+2x2 satisfies R2 =

Whenever x1 and x2 are uncorrelated, then R2 for the model E(y) = α+β1x1+β2x2 satisfies R2 = r2 yx1

+r2 yx2 .

In this case, draw a figure that portrays the variability in y, the part of that variability explained by each of x1 and x2, and the total variability explained by both of them together.