Linear functions word problem: fuel (Full video)

Khan Academy

Supporting grades: 8

Description: Sal is given a verbal description of a real-world relationship involving a truck's fuel consumption, and is asked to draw the graph that represents this relationship. Karl filled up the tank of his truck with 400 liters of fuel and set out to deliver a shipment of bananas to Alaska. The truck consumed 0.8 liters of fuel or eight-tenths of a liter of fuel for each kilometer driven. Graph the amount of fuel remaining in the truck's tank in liters as a function of distance driven in kilometers.

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