In December of 2003, the average price for a gallon of regular gas in the UUniStates was $1.50.a. At that time, what did it cost to buy 12 gallons of gas?. Is the relationship between number of gallons and cost proportional?Explain.Gerald paid $12.60 for a tank of gas.How many gallons did he buy?161At right is a graph of this situation. Predicthow the line would change to represent theaverage cost of gas in December of 2005when gas cost $2.20 per gallon on average.48 12 16Gallons of gas

In December of 2003, the average price for a gallon of regular gas in

1.	In December of 2003, the average price for a gallon of regular gas in the UUniStates was $1.50.a. At that time, what did it cost to buy 12 gallons of gas?. Is the relationship between number of gallons and cost proportional?Explain.Gerald paid $12.60 for a tank of gas.How many gallons did he buy?161At right is a graph of this situation. Predicthow the line would change to represent theaverage cost of gas in December of 2005when gas cost $2.20 per gallon on average.48 12 16Gallons of gas
Answer» As the relationship between gallons of gas(x) and cost of gas(y) is lineary = kx1.5 = k 1k=1.5So 12 gallon cost 1.512=18 $The relationship between them is proportional as cost increases as the quantity of gas increases.For 12.60$ ge would get 12.60/1.5=8.40 gallons of gas.