Question

A line segment has endpoints (1, 1) and (4, 4) . Demonstrating the properties of reflections across the y-axis, what are the reflected endpoints?
A. (-1, -1) and (-4, -4)
B. (1, -1) and (4, -4)
C. (-1, 1) and (4, 4)
D. (-1, 1) and (-4, 4)

Answer 1

Reflection across the y-axis maps (x, y) to (−x, y).
So (1, 1) → (−1, 1) and (4, 4) → (−4, 4).

Answer: D.