Mathematics for IGCSE & O level - Transformations (Section 2 - No. 13)
What happens to the coordinates of a point during a reflection across the y-axis?
The x-coordinate changes sign.
The y-coordinate changes sign.
Both coordinates change sign.
The coordinates remain unchanged.
คำอธิบาย
Reflecting over the y-axis: (x, y) -> (-x, y)