A quadrilateral I believe.
The answer would be
4d+2.75p=12
(1/2)x+b=y because the equation that given the slope is 1/2 if you leave y alone and take the x’s number
put the point now , 4+b=3 so b is -1
the equation is (1/2)x-1=y
The angles have to have a 90 degree angle , and they have to be equal too
