7. Billy is comparing gasoline prices at two different gas stations. At the first gas station, the equation c=2.80g gives the relationship between g, the number of
gallons of gasoline, and c, the total cost, in dollars.
At the second gas station, the cost of 2.5 gallons of gasoline is $8.30, and the cost of 5 gallons of
gasoline is $16.60.
I
How much money, per gallon, would Billy save by going to the less expensive gas station?
Explain why your solution makes sense.