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The point (−8, −10) was reflected over an axis to (8, −10). Which axis was it reflected over? Explain.

x-axis, because the x-coordinate is the opposite
x-axis, because the y-coordinate is the opposite
y-axis, because the x-coordinate is the opposite
y-axis, because the y-coordinate is the opposite

1 answer

The correct answer is y-axis, because the x-coordinate remains the same while the y-coordinate changes sign from negative to positive. Reflecting a point over the y-axis involves changing the sign of the x-coordinate while leaving the y-coordinate unchanged.
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