• • Kim hires students to clean houses for $450 a week. She rents equipment that costs $300 a week. The table gives Kim's total product and total cost schedules. At what output is Kim's average total cost minimum? Note: If two quantities have the same average total cost, we take the average quantity as that of the minimum average total cost. Kim's average total cost is minimal when she cleans how many houses per week?

    
    

    students	houses per week	dollars per week
    0	0	300
    1	2	750
    2	5	1200
    3	9	1650
    4	14	2100
    5	18	2550
    6	21	3000

    
    

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