Question

A barrel had 20 liters of water. Water leaked out from the barrel at a constant rate. After 24 hours, 14 liters of water was left in the tank. How many liters of water leaked out per hour.

Answer 1

so we start with 20 liters of water. After 24 hours there is 14 liters remaining.
so using ( time, # of liters of water) we have
(0, 20 ) , (24, 14) . find the slope of these two points