Mathematics for IGCSE & O level - Transformations (Section 6 - No. 29)

What happens when a figure is reflected in the line y = -x?

(x, y) becomes (-x, y)

(x, y) becomes (y, x)

(x, y) becomes (-y, -x)

(x, y) becomes (-y, x)

The coordinates (x,y) transform to (-y, -x).