11.2 Coordinates of a Point in Space

The reflection of a point $(x, y, z)$ in the YZ-plane preserves the y and z coordinates but negates the x coordinate.

• Original: $x = -2, y = 3, z = 4$.
• Image: $x' = -(-2) = 2, y' = 3, z' = 4$.
• Result: $(2, 3, 4)$.