The average rate of change on the given interval is 8.
How to get the average rate of change?
For a function f(x), the average rate of change on the interval (a, b) is given by:
[tex]r = \frac{f(b)- f(a)}{b - a}[/tex]
In this case, we have:
f(x) = x^2 + 3x - 4
And the interval is (-3, 8)
Replacing that in the general formula we get:
[tex]r = \frac{(8)^2 + 3*8 - 4 -((-3)^2 + 3*(-3) - 4)}{8 - (-3)} = \frac{88}{11} = 8[/tex]
So the average rate of change on that interval is 8.
If you want to learn more about the rate of change, you can read:
https://brainly.com/question/8728504
