Each equation represents a proportional relationship. Choose the equations for which the constant of proportionality is 3/4 A) 24y = 18x
B) y = 0.75x;
C)3x - 4y = 0
D) 4x - 3y = 0
E) y = - 3/4 * x

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).