Question

a triangle is rotated 90° about the origin. which rule describes the transformation? (x,y)→(−x,−y) (x,y)→(−y,x) (x,y)→(−y,−x) (x,y)→(y,−x)

Explanation:

Step1: Recall rotation rules

When a point $(x,y)$ is rotated 90° counter - clockwise about the origin, the new coordinates are $(-y,x)$.

Answer:

$(x,y)\to(-y,x)$