C onsider th e fo llo w in g sam p le data:

x 12 23 11 23 14 21 18 16 y

28 43 21 40 33 41 37 32

a. C onstruct a scatterp lot a nd verify th a t estim atin g a s im p le lin ear regression is a p p ro p ria te in this p ro b le m .

b. Calculate b1, a n d b0. W h a t is th e s am p le regression equation? P-968

c. Find th e predicted value fo r y if x e q u als 1 0 , 15, and 20.