Social Science: Alcohol and Tobacco Expenditures The following table gives the per capit...

Social Science: Alcohol and Tobacco Expenditures The following table gives the per capita expenditures for alcohol and tobacco for Americans in recent years.

a. Number the data columns with x-values 1–4 (so that x stands for years since 2008), use power regression to fit a power curve to the data, and state the regression formula. [Hint: See Example 7.]

b. Use the regression formula to predict these expenditures in the year 2020. [Hint: What x-value corresponds to 2020