What is the x and y

Question

Let y represent his total pay. Let x represent the number of copies of his book that he sells. Suppose that x and y are related by the equation 1700+70x=y. Numbers can have an increase or a decrease. 1. What is the change in the total pay for each copy sold? 2. What is the total pay if no copies are sold?

Answer 1

change in pay for each copy is +70.

 

total pay if x = 0 (no copies sold) is 1700.