The types of rotation are:
- Reflection: it is where the graph is inverted and each point is the same distance from the point of reflection
- Rotation: it is the act of rotating something around the axis
- Translation: it is where every point shift by the same unit
In this case:
⇒ it is reflection since the graph is inverted and each point is the same distance from the line of reflection
Answer: reflection
Hope that helps!