Sarah wants to buy the car that has a better mileage rating. Cars of Company A travel 20 miles per gallon and cars of Company B travel 14 km per liter. [1 mile=1.6km; 1 gallon=3.79 liters] Part A: Which company's car should Sarah buy? Justify your answer by comparing the mileages after converting to the same units. Part B: If 10 gallons of gas is filled in the car which gives better mileage, and you went on a drive and checked on the gas used every 30 miles, describe the appropriate scales on the x-axis and y-axis to graph the rate at which the car uses gas.

Question

Sarah wants to buy the car that has a better mileage rating. Cars of Company A travel 20 miles per gallon and cars of Company B travel 14 km per liter.  [1 mile=1.6km; 1 gallon=3.79 liters]  Part A: Which company's car should Sarah buy? Justify your answer by comparing the mileages after converting to the same units.  Part B: If 10 gallons of gas is filled in the car which gives better mileage, and you went on a drive and checked on the gas used every 30 miles, describe the appropriate scales on the x-axis and y-axis to graph the rate at which the car uses gas.