Question

Which choice shows the coordinates of B’ if the trapezoid is reflected across the x-axis?


On a coordinate plane, trapezoid A B C D has points (2, 2), (7, 2), (5, 1), (3, 1).
(–7, 2)
(2, –7)
(7, –2)
(–2, 7)

Answer 1

B = (7, 2). Reflecting across the x-axis changes (x, y) to (x, −y), so B' = (7, −2). (The third choice.)