In Problems 9 and 10, evaluate each expression using the graphs of y = f(x) and y = g(x) shown in the figure. 9. (a) (g • f)(-1) (c) (f° 8) (-1) 10. (a) (g •f)(1) (c) (f° g) (0) (b) (g •f) (0) (d) (f° g)(4) 6. y= g (x) (6, 5) (7, 5) (b) (g •) (5) (d) (f• g) (2) (1, 4) (5, 4) (8, 4) (-1, 3), (7, 3) (3, 1) (4, 2) (6, 2) (5, 1) (2, 2) (-1, 1), 2 4. 6 8 X -y = f(x) -2- (2, -2) (1, -1)

Select the graph that would represent the first steps of graphing the function f(x) = 2 cos(2(x - π)) Graph A -4n A -11 Graph C -3r O Graph B O Graph C O Graph A O Graph D -π/2 G F -2T1 2 1:5 -T 0 -0:5 G 19 0.5 -1:5 -2 --1- C 6 Ін 40 2 0 -2- -4 -6 + 3 +3 π/2 TT D J 2n E TT 3π 3m/2 4n 4rt Graph B -2п -3m/2 -TT -n/2 Graph D A A B -2 -3n/2 -TI -1/2 B 3 29 1 0 -1- -2 -3 -4 -5 -4 3 C 2 1 0 -2- -4 IC -3- -5 п/2 D п/2 E 17 TT D 3m/2 3n/2 Zn E 2πt 5m/2 5rt/2 Зг

If y = f(x) in the figure, find the following. y 1 -6 −4 -2 (a) f(9) = (b) f(5) = 12 10 8 6 4 2 -4 (5, 6) 2 4 (2,2) (9, 10) L CO 8 +X 10 12

9