Example 1

Andrew wants to estimate his gas mileage, or miles traveled per gallon of gas used. He records the number of gallons of gas he purchased and the total miles he traveled with that gas. Create a scatter plot showing the relationship between gallons of gas and miles driven. Which is a better estimate for the function that relates gallons to miles: y = 10x or y = 22x? How is the equation related to his gas mileage?
This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit www.walch.com for more information.