Question

Reflecting over the y-Axis
On a coordinate plane, triangle J K L has points (0, negative 1), (negative 2, 1), and (3, 3).

Reflect the triangle over the y-axis and find the coordinate of the image of point K.


K’(2, 1)
K’(–2, 1)
K’(–2, –1)
K’(2, –1)

Answer 1

Reflection across the y-axis changes (x, y) to (−x, y).
K = (−2, 1) reflects to K' = (2, 1).

Answer: K'(2, 1)