The average rate of change of the function over the given interval is 9
Here, we want to calculate the average rate of change of the function within the given interval
Mathematically, given a function f(x) , the average rate of change of the function within the interval a ≤ x ≤ b is given below;
withe respect to this question;
a = 1
b = 4
f(a) = f(1) = 12
f(b) = f(4) = 39
The average rate of change within the given interval is thus;