A figure with vertical line symmetry is placed on the coordinate plane. Given that the points (–8, –4) and (–3, –4) are on the edges of the figure, which of the following points lies on the line of symmetry?

The two points have the same y-coordinate, so the vertical line of symmetry is halfway between their x-coordinates. The midpoint is x = (−8 + −3) ÷ 2 = −5.5, so the line of symmetry is x = −5.5. Choice A, (−5.5, −4), lies on that line.

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