Bank revenue from overdraft fees for checking accounts, ATMs, and debit cards is increasing in the United

Question:

Bank revenue from overdraft fees for checking accounts, ATMs, and debit cards is increasing in the United States. In 2003, account overdraft revenue was $27.1 billion. This amount is estimated to increase to $38.0 billion by 2011. Find the average rate of change in account overdraft fees from 2003 to 2011.