You're having some work done on your computer. The service guy charges a $100 basic charge just to come out, plus $20 an hour for however long it takes. How much will it cost you if he comes out and works 8 hours?

y = final cost.
m = $20, the per-hour charge
x = 8, the number of hours worked
b = $100, the upfront charge.

y = mx + b
y = 20*8 + 100
y = 160 + 100
y = 260

An eight-hour job will cost you $260 dollars.

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SeanF

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