Question

How can you reflect a function across the x-axis?
A. Change the variable
B. Use an irrational exponent
C. Multiply the function by a negative coefficient
D. Subtract a number larger than 10 from the function

Answer 1

To reflect a function across the x-axis, you need to multiply the entire function by -1. This means that for a function \( f(x) \), the reflection across the x-axis would be represented as \( -f(x) \).

Therefore, the correct answer is:

**C. Multiply the function by a negative coefficient**.