Polygon WXYZ is shown on the coordinate grid. If polygon WXYZ was reflected across the y-axis to create polygon W’X’Y’Z’, which rule describes this transformation? (See reference image.)

Question

A.

(x, y) → (-x, y)
B.

(x, y) → (-x, -y)
C.

(x, y) → (x, -y)
D.

(x, y) → (y, x)

Answer 1

The correct rule that describes reflecting a point (x, y) across the y-axis is A. (x, y) → (-x, y).