Chapter 8.1, Problem 24PPS

To determine

To calculate: Find the value of function $f\left(-4\right)$ .

Answer to Problem 24PPS

The value of the function $f\left(-4\right)$ is $-21$ .

Explanation of Solution

Given that: Function $f\left(x\right)=3x-9$ , where $x$ is variable.

Calculation:

At the different value of $x$ we get the different value of the function.

Therefore, at $x=-4$ , the value of the function $f\left(x\right)$

  $\Rightarrow f\left(-4\right)=3\times \left(-4\right)-9$

  $\begin{array}{l}\Rightarrow f\left(-4\right)=-3\times 4-9\\ \Rightarrow f\left(-4\right)=-12-9\\ \Rightarrow f\left(-4\right)=-21\end{array}$