The relationship between number of beers consumed (x) and blood alcohol content (y) was studied in 16 male college students by using least squares regression. The following regression equation was obtained from this study: Y= -0.0127 + 0.0180x The above equation implies that: a) each beer consumed increases blood alcohol by 1.27%. b) on average it takes 1.8 beers to increase blood alcohol content by 1%. c) each beer consumed increases blood alcohol by an average of amount of 1.8%. d) each beer consumed increases blood alcohol by exactly 0.018.