Carol H. answered 08/15/14
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The midpoint formula is the following:
M (x1 + x2 , y1 + y2) Let x1 = -3 and y1 = 6 Let x2 = 6 and y2 = -4
2 2
M(-3 + 6 , 6 + -4)
2 2
M(3/2 , 2/2)
M( 1 1/2, 1)