Question

I need help please I don’t understand.

Answer 1

2

Explanation:

The rate of change in the closed interval [ a, b ] is

`(f(b)-f(a))/(b-a)`

Here [ a, b ] = [ 30, 50 ]

f(b) = f(50) = 100 ← from graph

f(a) = f(30) = 60 ← from graph , thus

average rate of change =
`(100-60)/(50-30)` =
`(40)/(20)` = 2