Chapter 13.1, Problem 33E

(a)

To determine

To calculate: The area under the curve in the graph using $n=4$ equal subdivisions and left-hand endpoints from $2013$ to $2021$ where the graph shows the annual per capita out-of-the-pocket expenses for U.S health care.

(b)

To determine

What the area under the curve in the graph represents where the graph shows the annual per capita out-of-the-pocket expenses for U.S health care.