Suppose you deposit dollars into a bank with simple interest. The amount in the account after years is given by (in dollars).
1. What is the average rate of change for the first year?
Rate (in dollars per year):

2. What is the average rate of change for the first five years?
Rate (in dollars per year):

3. What is the average rate of change for the first ten years?
Rate (in dollars per year):

4. Does the average rate of change increase or decrease as time from the initial deposit gets longer?