Question

Find the average rate of change of f(x)=10x²-7 over the interval [ 3, 9].

Answer 1

Answer: 120

Step-by-step explanation:

$f(3)=10(3)^{2}-7=83\\\\f(9)=10(9)^2-7=803\\\\\frac{f(9)-f(3)}{9-3}=\frac{803-83}{9-3}=\boxed{120}$