The function f(x)=1200(1.055)x models the balance of an investment x years after it is made. How does the average rate of change between years 21 and 25 compare to the average rate of change between years 1 and 5?

The average rate of change between years 21 and 25 is about 3 times the rate between years 1 and 5.
The average rate of change between years 21 and 25 is about 2 times the rate between years 1 and 5.
The average rate of change between years 21 and 25 is about 14 the rate between years 1 and 5.
The average rate of change between years 21 and 25 is about 15 the rate between years 1 and 5 .