Question

In its prime, Mr. Ford’s 2002 Focus would get 36

miles/gallon. Mr. Ford starts a road trip to San
Bernardino, Barstow, Kingman, Winona, and
Flagstaff, AZ. He starts with 13.2 gallons of gas in
his gas tank.
a) Write a slope-intercept equation that models how
much gas remains in his tank after each mile of of
travel(hint: g/mi)

Answer 1

The fuel economy is 36 miles per gallon. For each mile 1/36 gallon will be used.

Initial volume is 13,2 gallons and x is the number of miles.

Our equation is:

• y = 13.2 - 1/36x

or

• y = -1/36x + 13.2