Question

Which ordered pair is a reflection of (3, 7) across the y-axis?

(7, -3)
(-3, 7)
(-3, -7)
(3, -7)

Answer 1

(-3, 7)

Explanation:

It is like putting a mirror on the y-axis. It is asking what point is the photo negative of the point, like a mirror. You see yourself in the mirror but everything is opposite. Your right hand is your left. So which point is the photo negative of (3, 7)? (-3, 7) Because it is only across the y-axis, the y value stays the same.