Help meh!

Which is the BEST estimate of the average rate of change for the function graphed, over the interval 1 ≤ x ≤ 3?

A) 2

B) 3

C) 4

D) 6

Help mehWhich is the BEST estimate of the average rate of change for the function graphed over the interval 1 x 3A 2 B 3 C 4 D 6 class=