14. For each of the following,

(a) through (d), determine the linear prediction rule for predicting criterion variable Y from predictor variable X. Then

(e) make a single graph (with values from 0 to 100 on both axes) showing all the regression lines, labeling each by its letter. (Be sure to make your graph large enough so that the lines are clearly separate.)

Regression Constant a Regression Coefficient b

(a) 89.0 -.8

(b) 5.0 .7

(c) 50.0 .1

(d) 20.0 .4