The following table shows the percentage of the U. S. Discretionary Budget allocated to education in 2003, 2005, and 2009 (t = 0 represents 2000).

Year t 3 5 9
Percentage P(t) 6.8 7 6.2
Compute and interpret the average rate of change of P(t) over the period 2003−2005 (that is, [3, 5]), and over the period [5, 9]. Be sure to state the units of measurement. HINT [See Example 1.]

(a) over the period 2003−2005 (that is, [3, 5])

The average rate of change was ---Select--- % % per day % per month % per year , which means that U. S. education expenditure ---Select--- increased decreased at an average rate of ---Select--- % % per day % per month % per year during 2003−2005.

(b) over the period [5, 9]

The average rate of change was ---Select--- % % per day % per month % per year , which means that U. S. education expenditure ---Select--- increased decreased at an average rate of ---Select--- % % per day % per month % per year during 2005−2009.