Answer:
[tex]\frac{f(12)- f(8)}{12-8}[/tex]
Step-by-step explanation:
the average rate of change of f(x) over the interval [8,12]
The formula for average rate of change of f(x) over the interval [a,b] is
[tex]\frac{f(b)- f(a)}{b-a}[/tex]
Given interval is [8,12]
a= 8 and b = 12
So the average rate of change over the interval [8,12] is
[tex]\frac{f(12)- f(8)}{12-8}[/tex]
option 3 is correct
