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Mathematics 14 Online
OpenStudy (anonymous):

On a number line, point A has a coordinate of -6, and point B has a coordinate of 2. Which is the coordinate of point M, the midpoint of AB? (A) -3 (B) 0 (C) -2 (D) 4

Directrix (directrix):

Get the length of segment AB. Take half of that length and add it to -6 OR subtract it from 2. |dw:1386848234254:dw|

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