Geometry

Question Analysis：
This question tests whether the alignment condition for glide reflection is satisfied.
The main focus is the relationship between the reflection line and translation vector.

Key Concept Explanation:
For a glide reflection to occur:
The translation must be parallel to the mirror line
The reflection must be over a line
The vector ⟨3, 3⟩ indicates movement in the same direction as the line y = x → they are parallel.

Step-by-Step Solution：
Reflection line: y = x
Translation vector: ⟨3, 3⟩ — which follows slope 1
That direction is parallel to the line y = x
Therefore, it meets the condition for a glide reflection

Option Analysis：
A – Incorrect: the vector is not perpendicular
B – Correct: vector is par...