Question

What’s this answer ?

Answer 1

12

Explanation:

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

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

Here [ a, b ] = [ 1, 3 ] , then

f(b) = f(3) = 27 ← value of y from table for x = 3

f(a) = f(1) = 3 ← value of y from table for x = 1

average rate of change =
`(27-3)/(3-1)` =
`(24)/(2)` = 12