In 1970, 37.4% of American adults described themselves as regular cigarette smokers.By 2000, only 22.

In 1970, 37.4% of American adults described themselves as regular cigarette smokers. By 2000, only 22.4% of American adults described themselves as regular cigarette smokers. Show a linear equation that models this decline in smoking. Let x represent the number of years after 1970 and let y represent the percentage of American adults who described themselves as regular cigarette smokers.