Let
x------------> the length of Maya’s poster
w-----------> the width of Maya’s poster
y------------> Area of Maya’s poster
we know that
y=x*w
and
w=x-2
so
y=x*(x-2)-------------> y=x²-2x
using a graph tool
see the attached figure
the point (2, 0) represents that the area is 0 if the length is 2,
because the point (x,y) of the graph
x represent the length and y represent the area
