SOLUTION: Suppose you have a $5 off coupon at a fabric store. You buy fabric that cost $7.50 per yard. Write an equation that models the total amount of money "Y" you pay if you buy "X" yard

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Suppose you have a $5 off coupon at a fabric store. You buy fabric that cost $7.50 per yard. Write an equation that models the total amount of money "Y" you pay if you buy "X" yard      Log On


   

Question 1042704: Suppose you have a $5 off coupon at a fabric store. You buy fabric that cost $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?
Found 2 solutions by josmiceli, ikleyn:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+y+=+7.5x+-+5+
Here's the plot:
+graph%28+400%2C+400%2C+-10%2C+10%2C+-10%2C+30%2C+7.5x+-+5+%29+

Answer by ikleyn(52921) About Me  (Show Source):
You can put this solution on YOUR website!
.
How to explain the negative part of the function?