Question

Identify the glide reflection rule to map ΔABC onto ΔA′B′C′ in the given figure.

Multiple choice:

(A.) Translation: (x, y) → (x, y – 4); Reflection across the x-axis


(B.) Translation: (x, y) → (x + 4, y); Reflection across the x-axis


(C.) Translation: (x, y) → (x, y + 4); Reflection across the x-axis


(D.) Translation: (x, y) → (x, y – 4); Reflection across the y-axis

Answer 1

Answer D

Explanation:

First of all, you see that the shape moves down 4 units, which means that (x, y - 4) works. Then, you see it being flipped over vertically, which means it's going over the y-axis. You see that the last answer is the one that works.