National health care spending: The following table shows national health care costs, measured in billions of dollars. a. Plot the data. Does it appear that the data on health care spending can be...

National health care spending: The following table shows national health care costs, measured in billions of dollars.

a. Plot the data. Does it appear that the data on health care spending can be appropriately modeled by an exponential function?

 b. Find an exponential function that approximates the data for health care costs.

c. By what percent per year were national health care costs increasing during the period from 1960 through 2000?

d. Use functional notation to express how much money was spent on health care in the year 2005, and then estimate that value.