Macmillan Learning Stacked The Department of Motor Vehicles warns of the effect of drinking alcohol on blood alcohol content BAC in percent o volume One drink is defined as 12 ounces oz of beer or 4 oz of table wine or 1 25 oz of 80 proof liquor The impact of a single drink on a person s BAC depends on sex and weight For a 160 pound man the blood alcohol co a function of the number of drinks consumed in one hour can be expressed by the regression line BAC 0 023 x number of drinks What does the slope of this line tell you This is a horizontal line with a slope of zero This means the value of y is constant The slope is 0 023 this means that on average BAC decreases by 0 023 for each drink consumed The slope is 160 this means that on average BAC increases by 160 for each drink consumed The slope is 0 023 this means that on average BAC increases by 0 023 for each drink consumed Why do you think the intercept is zero O The intercept is zero because BAC can not be negative O The intercept is zero because individuals who did not have any drinks had a BAC of 0 O The intercept is not zero because the slope is too high O The intercept is zero because eventually every line goes through the origin