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

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.)

区
• A. (x, y) → (-x, y)
• B. (x, y) → (-x, -y)
• c. (x, y) → (x, -y)
D. (x, y) → (y, x)

Answer 1

The correct answer is A. (x, y) → (-x, y).

Reflecting a point across the y-axis simply changes the sign of the x-coordinate while keeping the y-coordinate the same. In other words, if the original point is (x, y), the reflected point will be (-x, y).