Question

1. what type of transformation does this represent? image of coordinate grid with two triangles, one blue and one purple, and multiple choice options: rotation, translation, reflection, stretch

Explanation:

The blue triangle and purple triangle are mirror images across the y-axis. Each point in the blue triangle has a corresponding point in the purple triangle where the x-coordinate is negated (e.g., if a point is (x,y) in the blue triangle, its mirror is (-x,y) in the purple triangle), which is the definition of a reflection over the y-axis.

Answer:

reflection