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Moderate

Midpoint of Line AB

ACTMAT-YJZ5KV

$ {\overline{AB}} $ lies in the x-y coordinate plane, and point M is the midpoint of $ {\overline{AB}} $.

If point A is at $(3,-4)$ and point M is at $(-1,6)$, what are the coordinates of point B?

A

$(-8,-20)$

B

$(-5,16)$

C

$(1,-1)$

D

$(2,-5)$

E

$(7,-14)$