Reflect the quadrilateral ABCD over
the y-axis to create A'B'C'D'.

Answer:
B (-2,4)
C (-3,1)
D(2,1)
A (2,3
Step-by-step explanation:
when you want to reflect over the Y-axis just flip the signs on X coordinate ([X],Y) and when you want to reflect over the X-axis flip the signs on the Y coordinate (X,[Y])