How do you find the average rate of change of y= -3(x-4)^2+3 over interval [-4,9]?

1 Answer
Nov 5, 2015

9

Explanation:

average rate of change : (f(b)-f(a))/(b-a)

b = 9
a=-4

((-3(9-4)^2+3)-(-3(-4-4)^2+3))/(9-(-4))

((-3(5)^2+3)-(-3(-8)^2+3))/(13)

((-3(25)+3)-(-3(64)+3))/(13)

((-72)-(-189))/(13)

9