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SeaWood11
The answer is B. (-3,4) as it is being flipped across the y-axis, so only the y-coordinate is being changed.

I hope that this helps! :)
Answer is B. ( -3, 4)
Reason

The rule for a reflection over the y -axis is (x,y)→(−x,y) . So from x to -x (-3) and y stays the same (4)