C o n s id e r th e s a m p le re g re s s io n s fo r th e lin e a r, th e lo g a rith m ic , th e e x p o n e n tia l, a n d th e lo g -lo g m o d e ls . For e a ch o f th e e s tim a te d m o d e ls , p r e d ic t y w h e n x e q u a ls 100.

Response Variable: y Response Variable: ln(y )

M odel 1 M odel 2 M odel 3 M odel 4 Intercept 240.42 − 69.75 1.58 0.77 X 4.68 NA 0.05 NA ln(x ) NA 162.51 NA 1.25 Se 83.19 90.71 0.12 0.09