Question

Let g(x) be the reflection of f(x) in the x-axis. What is the function rule for g(x)? Let g(x) be the reflection of f(x) = 3x + 12 in the x-axis. What is a function rule for g(x)?
A. g(x) = -3x + 12
B. g(x) = 3x + 12
C. g(x) = -3x - 12
D. g(x) = 3x - 12

Answer 1

Reflection rule in the x-axis:
g(x) = - f(x)

f(x) = 3x+12
g(x) = - f(x) = -3x-12

The correct choice is option (C)