An elliptical cylinder is sliced by a plane, as shown in the figure. Among the four given two-dimensional shapes, shape is the resulting cross section.

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

my guess would be b and d, but i didn’t actually get out the pen and paper. lol

step-by-step explanation: it is d

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).