Ethan is proving that the slope between any two points on a straight line is the same. He has already proved that triangles 11 and 22 are similar. Drag statements and reasons to complete the proof.

it is 10.6 according to my calculations

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).