4.

Evaluate the function rule for the given value.

f(x) = 3x for x = –4

–12

–64

1 answer

To evaluate the function \( f(x) = 3x \) for \( x = -4 \):

First, substitute \( x = -4 \) into the function:
\[ f(-4) = 3(-4) \]

Next, perform the multiplication:
\[ 3(-4) = -12 \]

So, the value of \( f(-4) \) is \( -12 \). Therefore, the answer is:

\[ \boxed{-12} \]