Answer: C
Step-by-step explanation:
The formula to find average rate of change is [tex]\frac{f(b)-f(a)}{b-a}[/tex]. Since the problem is asking for the average rate of change from the second to fifth year, we plug in a=2 and b=5.
[tex]\frac{f(5)-f(2)}{5-2}[/tex]
f(5)=420.4
f(2)=408.04
[tex]\frac{420.4-408.04}{5-2}=4.12[/tex]
Now, we get 4.12 dollars per year for the average rate of change.
