The manager of Quick Car Inspection reviewed the monthly operating costs for the past year. The costs ranged from $4,400 for 1,400 inspections to $4,200 for 1,000 inspections.
1. Calculate the variable cost per inspection.
2. Calculate the total fixed costs.
3. Write the equation and calculate the operating costs for 1,200 inspections.
4. Draw a graph illustrating the total cost under this plan. Label the axes, and show the costs at 1,000, 1,200, and 1,400 inspections.