Pbs: The Lowdown: Functional Relationships Between Quantities: Calculating Fuel Consumption

In these interactive visualizations, explore the relationship between calculating miles per gallon (mpg) to gallons per mile in fuel use for vehicles. Most drivers think gas usage falls linearly (in a straight line) as mpg increases. But the actual relationship between the two is curved: one additional mpg has significantly greater impact in the gas consumption of an inefficient vehicle than it does in a more efficient vehicle.