# How do you find the function values f(3a) given F(x) = -4x?

Feb 7, 2017

See the entire solution process belowL

#### Explanation:

To find $f \left(3 a\right)$ we need to substitute $\textcolor{red}{3 a}$ for every occurrence of $\textcolor{red}{x}$ in the function.

$f \left(\textcolor{red}{x}\right) = - 4 \textcolor{red}{x}$ becomes:

$f \left(\textcolor{red}{3 a}\right) = - 4 \times \textcolor{red}{3 a}$

$f \left(\textcolor{red}{3 a}\right) = - 12 a$