Question

Identifying Transformations
On a coordinate plane, triangles have points (negative 4, 1), (negative 1, 2), (negative 1, 1) and (negative 4, negative 1), (negative 1, negative 1), and (negative 1, negative 2).

Which type of transformation would move figure 1 onto figure 2?
translation
reflection
rotation
dilation

Answer 1

Reflection — specifically a reflection across the x-axis.
Each point (x,y) of figure 1 goes to (x,−y) in figure 2 (e.g. (−4,1) → (−4,−1), (−1,2) → (−1,−2), (−1,1) → (−1,−1)).