Graph f(x)=(-4x)/5+4

$f (x) = \frac{- 4 x}{5} + 4$

Rewrite the function as an equation.

$y = - \frac{4 x}{5} + 4$

Rewrite in slope-intercept form.

The slope-intercept form is $y = m x + b$ , where $m$ is the slope and $b$ is the y-intercept.

$y = m x + b$

Write in $y = m x + b$ form.

Reorder terms.

$y = - (\frac{4}{5} x) + 4$

Remove parentheses.

$y = - \frac{4}{5} x + 4$

Use the slope-intercept form to find the slope and y-intercept.

Find the values of $m$ and $b$ using the form $y = m x + b$ .

$m = - \frac{4}{5}$

$b = 4$

The slope of the line is the value of $m$ , and the y-intercept is the value of $b$ .

Slope: $- \frac{4}{5}$

y-intercept: $(0, 4)$

Slope: $- \frac{4}{5}$

y-intercept: $(0, 4)$

Any line can be graphed using two points. Select two $x$ values, and plug them into the equation to find the corresponding $y$ values.

Write in $y = m x + b$ form.

Reorder terms.

$y = - (\frac{4}{5} x) + 4$

Remove parentheses.

$y = - \frac{4}{5} x + 4$

Create a table of the $x$ and $y$ values.

$\begin{array}{c} x & y \\ 0 & 4 \\ 5 & 0 \end{array}$

Graph the line using the slope and the y-intercept, or the points.

Slope: $- \frac{4}{5}$

y-intercept: $(0, 4)$

$\begin{array}{c} x & y \\ 0 & 4 \\ 5 & 0 \end{array}$