The size of the lawn is not dependent how much water is used, however the amount of water used is dependent on the size of the lawn (be it larger or smaller).
A vertical translation 1 unit down since for example x is 1, if u plug it in both equations it is f(1)=1*2-1 which equals f(1)=1 and the point is (1,1) for the other one, g(1)=(1-1)2-1 it equals g(1)=-1
