Personal income total personal income in the united states

Question

Question: Personal income total personal income in the United States (in billions of dollars) for selected years from 1960 and projected to 2018 is given in the table.

These data can be modeled by

I = 492.4e^0.067x

where x is the number of years past 1960.

(a) If this model is accurate, find the rate of change of the total U.S. personal income in 2008 and 2015.

(b) Use the data to find the average rate of change from 2000 to 2008.