# How do you graph by plotting points for f(x)=5x-8?

Jul 31, 2015

Generate values of $f \left(x\right)$ for a few values of $x$,
then plot your points $\left(x , f \left(x\right)\right)$ and connect with a line.

#### Explanation:

Since the equation is linear only 2 points are needed, but several will help ensure accuracy.

$x = 0 \rightarrow f \left(x\right) = - 8$$\textcolor{w h i t e}{\text{XXXX}}$$\Rightarrow \left(0 , - 8\right)$ is a point on the line
$x = 1 \rightarrow f \left(x\right) = - 3$$\textcolor{w h i t e}{\text{XXXX}}$$\Rightarrow \left(1 , - 3\right)$ is a point on the line
$x = 2 \rightarrow f \left(x\right) = 2$$\textcolor{w h i t e}{\text{XXXX}}$$\Rightarrow \left(2 , 2\right)$ is a point on the line
$x = 3 \rightarrow f \left(x\right) = 7$$\textcolor{w h i t e}{\text{XXXX}}$$\Rightarrow \left(3 , 7\right)$ is a point on the line