SOLUTION: If 15 sports jerseys cost $420 and 25 jerseys cost $580, write a linear equation that gives the cost C for j jerseys.

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Question 1016220: If 15 sports jerseys cost $420 and 25 jerseys cost $580, write a linear equation that gives the cost C for j jerseys.
Answer by FrankM(1040) About Me  (Show Source):
You can put this solution on YOUR website!
change in cost, $160 divided by change in jerseys, 10, gives us a slope of $16.
But since another 15 jerseys would cost $240, we have an intercept of $180.
C=16J+180
When asked how to explain this, the $180 is the setup fee. The cost we start at for zero product, and then the cost per jersey starts.