1) A statistical process control (SPC) system is a method of measuring the number of defects in a product. A quality control manager is starting a new SPC program at a base
cost of $25,000. The manager can choose to add an additional personal computer (PC) to
a department at a cost of $2000 per department.

a) Write a linear model that gives the total cost as a function of the number of
departments that will add an additional PC.