Joey was reviewing his test scores for the second marking period. His following test scores were 85, 80, 90, 85, 75, 80, 85. Joey believes that his second marking period grade will be an 85. Is Joeys assumption correct or incorrect? Explain and justify with reasoning.

PS: I’ll mark branliest

we need the options

step-by-step explanation:

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).