Each of the tables represents a direct variation situation. Write an equation for this situation. (example : y=10x) Jonathan earns $12.75 per hour at his job.
Hours (x)

1

2

3

4

Earnings (y)

12.75
38.25

Aschool typically sells 500 yearbooks each year for 50 dollars each. the economic calls does a project and discovers that they can sell 100 more yearbooks for every $5 decrease in price. the revenue for yearbook sales is equal to the number of yearbooks sold times the price of the yearbook. let x represent the number of $5 decrease in price. if the expression that represents the revenue is written in the form r(x)=(500+ax)(50-bx). to maximize profit, what price should the school charge for the yearbooks? what is the possible maximum revenue? if the school attains the maximum revenue, how many yearbooks will they sell?

One integer is 8 times another. if the product is 72, then find the integers

The measure of an angle is 117°. what is the measure of a supplementary angle?