Respuesta :
Answer:
180° rotation
Step-by-step explanation:
sign changes when we rotate a point to 180 degrees. so 9 became -9 and -1 became 1, which gave us the clue that it's 180° rotation
The given situation described 180° rotation
Given information:
Andrew's rotation maps point M(9, -1) to M'(-9, 1).
Rotation:
Since signing is changed when we rotate a point to 180 degrees. So here 9 became -9 and -1 became 1, which provides us the clue that its 180° rotation.
learn more about the point here: https://brainly.com/question/24450263