# Evaluate the function rule for the given value, f(x) = 3x for x = –5

We will substitute the value of x in f(x) and find the function value

## Answer: The function value of f(x) for x = -5 is f(-5) = -15

Lets solve it step by step

**Explanation: **

We know that x = -5, substitute in f(x)

f(x) = 3x

f(-5) = 3(-5)

f(-5) = -15