A water collection barrel holds 55 gallons of rainwater. Water is used from this barrel at a rate of 15 gallons every 3 days. At this rate, when will a full barrel of water be completely empty.

Atruck travels from a factory to a gas station in 4 minutes. it stops at the gas station for 3 minutes. the truck then returns to the factory in 3 minutes. which graph best represents the distance, y, in miles, of the truck from the factory for a certain amount of time, x, in minutes?