First we will obtain the original coordinates
A = (-3, 4)
B = (-1, 4)
C = (1, 1)
D = (-5,1)
When you reflect a point across the line y = x, the x-coordinate and y-coordinate change places. If you reflect over the line y = -x, the x-coordinate and y-coordinate change places and are negated (the signs are changed).
The reflection of the point (x,y) across
the line y = -x is the point (-y, -x).
A' = (-4, 3)
B' = (-4, 1)
C' = (-1, -1)
D' = (-1, 5)