9 The U.S. GNP during the years 19751984 is given in Table 32 in billions of dollars

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9 The U.S. GNP during the years 1975–1984 is given in Table 32 in billions of dollars (file GNP.xls).

a Plot x  years after 1974 against GNP, and use the plot to describe how to fit a curve that could be used to predict GNP during future years.

b When the regression on transformed data is done, we find that bˆ0  6.86 and bˆ 1  0.105. What is the prediction for 1985 GNP?

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