Question

Which choice shows the coordinates of C’ if the trapezoid is reflected across the y-axis?

On a coordinate plane, trapezoid A B C D has points (2, 1), (3, 5), (5, 3) and (3, 1).
(–5, 3)
(3, –5)
(5, –3)
(–3, 5)

Answer 1

Reflection across the y-axis maps (x, y) to (−x, y). Point C is (5, 3), so C' = (−5, 3). Thus the correct choice is (−5, 3).