Proportional Proportional
y is 3 times x
y is times x
Not proportional
Not proportional

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong

okay..i will pick 8!

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).