What is the slope of a line that passes through the points (5, 12) and (8, -1)

m = -4.33333 or -4 and 1/3

Step-by-step explanation:

gradient = (difference in y)/(difference in X)

m = (-1-12)/(8-5)

m = -13/3

m = -4.3333333

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).