Suppose you have a $5-off coupon at a fabric store. You buy fabric that costs $7.50 per yard. Write an equation that models the total amount of money y you pay if you buy x yards of fabric. What is the graph of the equation?
The equation that models the total amount of money y you pay if you buy x yards of fabric can be written as y = 7.50x - 5.
The graph of this equation will be a straight line with a slope of 7.50 and a y-intercept of -5.