Question

A line contains the 6, −3) and (3, 1). When this line is reflected across the y-axis, what are the two new points?
A. (-6, -3) and (-3, 1)
B. (6, 3) and (3, -1)
C. (-6, 3) and (-3, -1)
D. (-6, -3) and (3, 1)

Answer 1

Reflection across the y-axis sends (x, y) to (-x, y).
So (6, −3) → (−6, −3) and (3, 1) → (−3, 1).
Answer: A.