9. The graph of h is a translation 4 units right and 1 unit down of the graph of f(x) = x. Write function h in vertex form. 10. What is the axis of symmetry of the graph of the function f(x) = 2x + 8x-5? A x=-5 C x=-2 B x=-4 D x=2 11. The function h(t)=-16+ 24t models the height, in feet, of a kangaroo t seconds after it jumps. What is the maximum height of the jump? A 9 ft C 27 ft B 18 ft D 36 ft 12. The function f(x) = x+ bx +1 is shown in the graph. What is the value of b? -4 O 4 8 OQ 8