What is the area of this polygon?

The above polygon is a pentagon 
The polygon has a rectangle and a triangle 
Area of triangle FSCW
 = Length × width
 =  9 × 2
 = 18 square units
area of triangle FNS
 = 1/2 × base× height
 = 1/2 × 9 × 6
  = 27 square units
Therefore the area of the polygon is
   = 27 + 18
   = 45 square units

There is no graph but what i can say is that 1 is the slope and that -2 is the y- intercept