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Answer with sometimes, always, or never true. Give an example/counterexample.

When a point is reflected across the y-axis, the new point has a negative x-coordinate.

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Sometimes
If the original x coordinate is negative, it will become positive. For example, (-5, 5) would become (5,5), which is a positive x. The sign of the x changes when reflected over the y axis.
User Andrey Ischencko
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