You would think that your blood alcohol content (BAC) would be directly proportional to how many beers you drink in an hour. Strangely enough, for both males and females of a specific weight, the BAC is directly proportional to the number (N − 1) of beers they drank during the last hour. (a) Write an equation of variation between BAC and the number of beers a man drank during the last hour. (Use k as the constant of variation.) BAC =  k(N−1)       (b) For a 150-lb average man, his BAC after 3 beers is 0.046. Find k. (Round your answer to three decimal places.) k =   (c) What is his BAC after 5 beers? (Round your answer to three decimal places.) (d) How many beers can the man drink before going over the 0.08 BAC limit? (Round your answer to the nearest whole number.)  __________ beers

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.