Geometry

Question Analysis:
This question involves rotating a point 180° about the origin.
The main focus is on applying the correct coordinate transformation.

Key Concept Explanation:
180° rotation about the origin: (x, y) → (−x, −y)

Step-by-Step Solution:
Original point: (1, 5)
Apply rule: (−1, −5)

Option Analysis:
A. (5, -1) — Incorrect, wrong swap and signs
B. (-1, -5) — Correct
C. (-5, 1) — Reversed valu...