Question

Find the rate of change

Answer 1

9

Explanation:

The rate of change of a function f(x) in the closed interval [ a, b ] is

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

here [ a, b ] = [ 3, 7 ]

f(b) = f(7) = 47 and f(a) = f(3) = 11, hence

rate of change =
`(47-11)/(7-3)` =
`(36)/(4)` = 9