Multiple Transformations - Grid Image & Final Image to Transformations

Question

The triangle ABC (blue) is transformed onto triangle A'B'C' (red) by two transformations applied in sequence. Which pair of transformations was used?

Accepted Answer

Rotate 270° clockwise about the origin, then reflect across the y-axis.

Answer

Reflect across the y-axis, then rotate 270° clockwise about the origin.

Answer

Rotate 90° clockwise about the origin, then reflect across the y-axis.

Answer

Rotate 270° clockwise about the origin, then reflect across the line y = x.