Rogers father knows that dial it up sells data plan at $16 for 2 GB and ring ring cells data plans at nine dollars for one gigabyte. Use this information to calculate the ratio of the number of gigabytes to the price in dollars for dial it up and ring ring

5+2x=a

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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).

b is the right answer