Question

How to find the average rate of change if the function​

Answer 1

14

Explanation:

Average rate of change is given as
`(f(b) - f(a))/(b - a)`

Where,

a = 4,

f(a) = f(4) = (4)² + 3(4) = 16 + 12 = 28

b = 7,

f(b) = f(7) = (7)² + 3(7) = 49 + 21 = 70

Plug in the values into the formula

Average rate of change =
`(70 - 28)/(7 - 4)`

`= (42)/(3) = 14`