Question

The average rate of change of a function between x = a to x = b is f(b) - f(a) / (b - a). Now use this formula to find the rate of change of the function f(x) = x^2 between x = 4 to x = 8 *

Choose a answer:
1) 8
2) 4
3) 80/12
4) 12

Answer 1

4) 12

Explanation:

f(4) = 4² = 16

f(8) = 8² = 64

(64 - 16)/(8 - 4)

48/4

12