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Question

Anthony is running for class president and wants to hang posters in the halls at school. The local print shop charges a set up fee of 15.00 dollars and 3.50 dollars per poster.

Find the equation, in slope-intercept form, of the line that represents the cost to print x posters

Answer 1

Start with the per-poster cost. The per-poster cost can be found by multiplying 3.50 by the number of posters. If we let F = fee and P = the number of posters, it would look like this:

F = 3.50P

The setup fee is the same, regardless of how many posters are printed, and so we can add that to the per-poster cost:

F = 3.50P + 15.00

If you want to graph this, you can replace F with Y, and P with X to get the following:

Y = 3.50X + 15.00