Math-Steve

8. A gas station charges $2.19 per gallon of gas. Use function notation to describe the relationship between the total cost C(g) and the number of gallons purchased g.

a. C(g) = -2.19 g
b. g = 2.19C(g)
c. C(g) = g + 2.19
d. C(g) = 2.19g

I think its C.

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asked by Jman
  1. Please help me!

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    posted by Jman
  2. well, surely you must see that the cost is 2.19 times the number of gallons, since each gallon costs $2.19.

    C(g) = 2.19g
    Looks like (d) to me.

    choice (c) means that even if you have 0 gallons, you still have to pay $2.19, and then add to that $1 for each gallon. Booo!

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    posted by Steve

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