Geometry

Question Analysis:
Applies two transformations in sequence, asks for correct coordinate rule.

Key Concept Explanation:
Translation 3 units left: (x, y) → (x − 3, y)
Reflection over y-axis: (x, y) → (−x, y)
Apply in sequence.

Step-by-Step Solution:
Start with (x, y)
→ Translate: (x − 3, y)
→ Reflect: (−(x − 3), y) = (−x + 3, y)

Option Analysis:
B is correct.
Other options misuse coordinate rule...