Question

the scatterplot and regression line below show the relationship between the percentage of american adults who smoke and years since 1945. the fitted line has a y - intercept of 41. what is the best interpretation of this y - intercept? choose 1 answer: a the model indicates that approximately 41% of american adults smoked in 1985. b in 1945, approximately 0% of american adults were smokers. c 41% of american adults smoke. d the model indicates that 41% of american adults smoked in 1945.

Explanation:

The y - intercept in a regression line of the percentage of American adults who smoke vs years since 1945 is the value of the percentage of smokers when the number of years since 1945 is 0. That is, in the year 1945, the model indicates that 41% of American adults smoked.

Answer:

D. The model indicates that 41% of American adults smoked in 1945.