Question

If f(x)=x3−x, what is the average rate of change of f(x) over the interval [1, 5]?
A)29.5
B)30
C)43
D)120

Answer 1

is it
\[ f(x) = x^3 - x\]?

Answer 2

the max value of x is 5
the min value is 1

so the interval is 4

find (f(5)-f(1))/4