Which of the following would be a line of reflection that would map ABCD onto itself? (4 points)

y = 2

3x + y = 1

3x + y = −1

−3x + 3y = 9

Which of the following would be a line of reflection that would map ABCD onto itself 4 points y 2 3x y 1 3x y 1 3x 3y 9 class=