Triangle ABC was transformed using the rule (x, y) → (–y, x). The vertices of the triangles are shown. A (–1, 1) B (1, 1) C (1, 4) A' (–1, –1) B' (–1, 1) C' (–4, 1) Which best describes the transformation? The transformation was a 90° rotation about the origin. The transformation was a 180° rotation about the origin. The transformation was a 270° rotation about the origin. The transformation was a 360° rotation about the origin.

The best option that describes the transformation (x, y) → (–y, x) is;

Option A; The transformation was a 90° rotation about the origin

We are given the transformation rule used as; (x, y) → (–y, x)

A (–1, 1) → A' (–1, –1)

B (1, 1) → B' (–1, 1)

C (1, 4) → C' (–4, 1)

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the transformation was 90° at the origin

Step-by-step explanation:

the transformation was 90° at the origin

i believe the answer is letter c) 8

step-by-step explanation:

cosine

step-by-step explanation: