Question

A vat contains 20 gallons of liquid when a drain pipe opens and the liquid begins to leave the vat at a rate of 5 gallons per hour.

Use the Line tool to graph the amount of liquid remaining in the vat at any hour, x.

Answer 1

just start from 20 at hour 0 then 15 for hour 2 and so on

Answer 2

The answer is to (place your point on 20, then go down to 15 move over 1 and place your point.)