Solve the problem. See Example 9.
Making circuit boards. The weekly cost of making circuit boards is a linear function of the number of boards made. The cost is $1500 for 1000 boards and $2000 for 2000 boards.
a) Express the linear function in the form C = mn + b, where C is the cost in dollars and n is the number of boards.
b) What is the cost if only one circuit board is made in a week?
c) Graph the linear function.
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