A tank contained 90 gallons of water. The tank is drained at a rate of 5 gallons per minute. Which graph represents the number of gallons of water, y, i​​​​n the tank x minutes after it begins to drain?​​

A tank contained 90 gallons of water The tank is drained at a rate of 5 gallons per minute Which graph represents the number of gallons of water y in the tank x class=