Question

If B(3,-9)and B'(3,9),what was the type of reflection used?

Answer 1

It is a reflection across the x-axis.

Explanation:

In a reflection across the x-axis, the x-coordinates remain the same, while the y-coordinates change sign. In this case, both points have the same x-coordinate of 3, but the y-coordinate of B changes from -9 to 9 in B', indicating a reflection across the x-axis.