Three vertices of a rectangle have coordinates (-3, 1), (7,1), and (7, - 4).

What are the coordinates of the fourth vertex of the rectangle?

A.

(-3, - 4)

B.

(-3, - 1)

C.

(7, - 3)

D.

(7, 4)

The answer is A because a rectangle has sides that go straight down basically - 3 there has to be two - 3 for x coordinate and two 7 for y coordinate and the missing coordinate also has to line up with the coordinate right next to it so it must have - 4 as it's coordinate so basically the coordinate vertically across from it has the same x coordinate and the coordinate horizontal from it has the same y coordinate. So it's (-3,-4)