Question

In The Figure Below, What is the reflection of point D across line x=0?

A. (-1, 1)

B. (1, 1)

C. (-1, 1)

D. (1, -1)

Answer 1

x=0 is actually the y axis, so the y coordinate of the reflection doesn't change, while the x coordinate changes from a negative to a positive or from a positive to a negative.
the new confidante of D is (1,-1)