William has a smart phone data plan that costs $40 per month that includes 6 GB of data, but will


William has a smart phone data plan that costs $40 per month that includes 6 GB of
data, but will charge an extra $25 per GB over the included amount. How much
would William have to pay in a month where he used 3 GB over the limit? How much
would William have to pay in a month where he used went over by GB?
Cost when over by 3 GB:
Cost when over by x GB:


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