Answer: The answer is 870
If the last digit is 0, then we do not have to do any rounding, because it is already to the ten.
Explanation:
The line of reflection is the perpendicular bisector of the segment joining a point with its reflected image.
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The segment joining a point with its reflection is as short as possible consistent with the requirement that the reflected point be the same distance from the line that the original is. That means it is perpendicular to the line of reflection. Since the distance from that line is the same on either side, the line of reflection bisects the joining segment.
B, (0,3)
If you plot each point this is the only one that touches the line.
