A parallelogram is transformed according to the rule (x, y) → (x, y). Which is another way to state the transformation?

The transformation rule given is \( (x, y) \to (x, y) \). This means that every point of the parallelogram remains unchanged after the transformation.

This transformation represents a rotation about the origin by an angle of 0 degrees (R0, 0°), which keeps the shape and position of the parallelogram intact. However, among the options given, 360° (which is a full rotation back to the same position) is also equivalent to no transformation at all.

Thus, the most appropriate way to state the transformation using the options provided is:

**R0, 360°**