7. 26. f(x) 8. f(x) = -x; (-2, 0), (-2, 2) Find the average rate of change of y with respect to x (a) on the interval (1,3), (b) on the interval (3, 5). 27. f(x) 28. f(x 29. f(t) e of were YA 6 (3,6) 30. f(r y = f(x) 31. f(u 33. Bet (5,2) the 2- (1, 2) 1 2 3 4 5 x 10. Refer to the figure in Exercise 9. Find the average rate of change of y with respect to x on the interval (1,5). 11. If a baseball is dropped from the top of a building, the dis- tances in feet that the ball has fallen is given by s(t) = 16t, when