Geometry

Question Analysis:
You’re given both a point and its image.
The main focus is again to work backward to identify the reflection line between two points.

Key Concept Explanation:
If y is the same, the reflection is horizontal → across a vertical line (x = …)
The reflection line is always the midpoint of the x-values

Step-by-Step Solution:
Point B: (2, 7)
B′: (6, 7)
Since y is unchanged, reflection is across a vertical line
Midpoint between x = 2 and x = 6:
→ (2 + 6) ÷ 2 = 4
So, the reflection line is x = 4

Option Analysis:
A. x = 4 ✅ Correct — midpoint of x-values
B. y = 7 ❌ That’s the y-value of both points, not the reflection line
C. x = 2 ❌ That’s one of the points, not the center
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