To find for what number of binders the costs are the same for two different companies, we have to identify the approximate points at which the graphs intersect.
From the graph we can conclude the following approximations about the numbers of binders.
Company comparison
Number of Binders When the Cost Is the Same
A & B
≈35
B & C
≈20
A & C
≈50
b
We can treat each pair of companies as a system of linear equations. The number of binders found in Part A are x-coordinates of the solutions to each of these systems of equations.
