<PRE><B>Question 184316</B>
Given the points P(-1,-6), Q(15,24), and M(7,9), prove that M is the midpoint of segment PQ.
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The x-coordinate of the midpoint is the average of the endpoint
x-coordinates.  Same for the y-coordinate of the midpoint.
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Your problem:
(15 + -1)/2 = 14/2 = 7
(24 + -6)/2 = 18/2 = 9
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Cheers,
Stan H.</PRE>