The figure shows a kite inside a rectangle. which expression represents the area of the shaded region? 2x2 4x2 6x2 8x2

The picture in the attached figure

we know that
area of the the shaded region=area of rectangle -area of a kite

area of rectangle=(3x+x)*(x+x)----> 4x*2x---> 8x²

area of a kite=(1/2)*[d1*d2]
where d1 and d2 are the diagonals
d1=4x
d2=2x
so
area of a kite=(1/2)*[4x*2x]----> 4x²

area of the the shaded region=8x²-4x²-----> 4x²

the answer is 
4x²

Which of the following values are in the range is the function graphed below? check all that applya.3b.1c.0d.-2e.5f.2a

That they are numbers and related to each other.