Answer
Cigarettes smoked = 48 – (0.178 x number of people who run regularly)
Work Step by Step
We want to find the regression line for predicting the number of cigarettes smoked per day (in millions) from the number of people who regularly run for exercise. The first variable given is the slope because it represents a change (in this case a decrease) in y for every one unit increase in x. The next variable given is the intercepts, as it represents the value of y when x = 0.
