Answer:
(x, y) - (y, -x)
Step-by-step explanation:
Rotation is a process in which the orientation of a given figure is changed by turning it about a point called origin. The rotation can be done either clock-wisely or counterclockwise about the origin.
If the given triangle is rotated clockwise, the rule that describe the transformation is; (x, y) - (y, -x)
If the given triangle is rotated counterclockwise, the rule that describe the transformation is; (x, y) - (-y, x)
In the given question, the required rule is; (x, y) - (y, -x). This shows a clockwise rotation of about the origin.