Question

Triangle ABC is reflected across the x-axis. If the coordinates of the original shape are A (−4, −1), B (−5, −2), and C( −10, −1), what are the coordinates of A′, B′, and C′?
A. A' (-4, 1), B' (5, -2), and C' (-10, 1)
B. A' (4, -1), B' (5, -2), and C' (10, -1)
C. A' (4, 1), B' (5, 2), and C' (10, 1)
D. A' (-4, 1), B' (-5, 2), and C' (-10, 1)

Answer 1

Reflecting across the x-axis changes (x, y) to (x, −y).

A(−4, −1) → A′(−4, 1)
B(−5, −2) → B′(−5, 2)
C(−10, −1) → C′(−10, 1)

So choice D.