Answer:
B(6, -3)
Step-by-step explanation:
Reflection over the origin changes the signs of the coordinates.
(x, y) ⇒ (-x, -y) . . . . reflection over the origin
A(-6, 3) ⇒ B(6, -3)
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Additional comment
Reflection over the origin is fully equivalent to rotation 180° about the origin, or reflection over both the x- and y-axes (in any order).
