Geometry

Question Analysis:
This question involves identifying the line of reflection, given a point and its reflected image.  
The main focus is on using symmetry to find the correct vertical line.

Key Concept Explanation:
- If a point and its reflection share the same y-coordinate, the reflection was over a vertical line.  
- The line of reflection lies midway between the original and image x-values.

Step-by-Step Solution:
1.  
2. Since y-values are the same → reflection is over a vertical line  
3. Midpoint of x-values:  
 

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