Question

On a coordinate plane, 2 triangles are shown. The first triangle has points M (negative 5, 4), N (negative 2, 3), and L (negative 4, 2). The second triangle has points L prime (negative 4, negative 2), M prime (negative 5, negative 4), and N prime (negative 2, negative 3).
What is the rule for the reflection?

rx-axis(x, y) → (–x, y)
ry-axis(x, y) → (–x, y)
rx-axis(x, y) → (x, –y)
ry-axis(x, y) → (x, –y)

Answer 1

Reflection across the x-axis. Rule: (x, y) → (x, −y).

Check: M(−5, 4) → M′(−5, −4), N(−2, 3) → N′(−2, −3), L(−4, 2) → L′(−4, −2).