Cigarette smoking. The data in Table 7 shows that the percentage of male cigarette smokers in the U.S. declined from 27.6% in 1997 to 23.9% in 2006.
(A) Applying linear regression to the data for males in Table 7 produces the model
m = -0.42t + 27.23
where m is percentage of male smokers and / is lime in years since 1997. Draw a scatter plot of the male smoker data and a graph of the regression model for 0 (B) Estimate the first year in which the percentage of male smokers is less than 15%.