Gross domestic product (GDP) is a major indicator of a nation's overall economic activity. It consists of personal consumption expenditures, gross domestic investment, net exports of goods and services, and government consumption expenditures. The file GDP contains the GDP (in billions of current dollars) for the United States from 1980 to 2018.
a. Plot the data.
b. Compute a linear trend forecasting equation and plot the trend line.
c. What are your forecasts for 20 19 and 2020?
d. What conclusions can you reach concerning the trend in GDP?