Vehicle	x = engine size (liters)	y = combined mpg
Mini Cooper	1.6	31
Ford Focus	2	28
Toyota Camry	2.5	26
Subaru Forester	2.5	23
Honda Accord	2.4	26
Toyota Highlander	2.7	22
Chevrolet Equinox	3	19
Ford Taurus	3.5	20
Dodge Nitro	4	17
Cadillac Limousine	4.6	14