Urgent Math Question

Question

Diane is a software saleswoman. Let y represent her total pay (in dollars). Let x represent the number of copies of History is Fun she sells. Suppose that x and y are related by the equation y=1800 + 120x.

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Answer the questions below. Note that a change can be an increase or a decrease. For an increase, use a positive number. For a decrease, use a negative number.

1. What is the change in Diane's total pay for each copy of History is Fun she sells?	2. What is Diane's total pay if she doesn't sell any copies of History is Fun?
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Answer 1

change in total pay, y, = the coefficient of the x term =$120

if she doesn't sell any History is Fun, then total pay y = $1800

y=1800+120x

1800= the y intercept, 120 = slope