Chapter 2.2, Problem 30E

Oil Imports Crude oil and petroleum products are imported continuously by the United States. The table shows the billions of dollars of net expenditures for the imports of these products for several years.

1. a. Write a linear function that models this data, with x equal to the number of years after 2015 and y equal to the billions of dollars of expenditures. Report the model with two decimal places.
2. b. Is the model an exact fit for the data?
3. c. What does the model predict the billions of dollars of net expenditures will be for the imports in 2023?
4. d. When does the model predict the billions of dollars of net expenditures for the imports will be 208.2 $billion?

Year	No Expenditures ($ billions)
2018	191.0
2020	198.9
2022	214.5
2024	228.4

(Source: Energy Information Administration)