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P divides a line segment AB into two equal halves.
P lies at (-1, 4) and B lies at (2,7).
What are the coordinates of A?

Respuesta :

sqdancefan

Answer:

  A(-4, 1)

Step-by-step explanation:

The parts being equal means ...

  A - P = P - B

  A = 2P - B . . . . . . . . useful to remember for P being the midpoint of AB

  A = 2(-1, 4) -(2, 7) = (-2-2, 8-7)

  A = (-4, 1)

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