Suppose you run a regression on a data set of Xs and Ys and obtain a least squares line of Y = 12 - 3X.
a. If you double each value of X, what is the new least squares line?
b. If you triple each value of Y, what is the new least squares line?
c. If you add 6 to each value of X, what is the new least squares line?
d. If you subtract 4 from each value of Y, what is the new least squares line?