Geometry

Question Analysis：
Tests whether students can spot errors in reflection, especially with signs and position.

Key Concept Explanation:
Reflecting over y = x swaps coordinates: (x, y) → (y, x).
Signs stay the same unless they’re part of the original values.

Step-by-Step Solution：
Original point: (–6, 4)
Swap → (4, –6)
The student gave (–6, –4), which is just changing the sign of y — incorrect.

Option Analysis：
A. No — student's answer is wrong
B. Incorrect swap and sign
C. ✅ Correct answer