Graph 8x-5y=40

$8 x - 5 y = 40$

Step 1

Solve for $y$ .

Subtract $8 x$ from both sides of the equation.

$- 5 y = 40 - 8 x$

Divide each term in $- 5 y = 40 - 8 x$ by $- 5$ and simplify.

Divide each term in $- 5 y = 40 - 8 x$ by $- 5$ .

$\frac{- 5 y}{- 5} = \frac{40}{- 5} + \frac{- 8 x}{- 5}$

Simplify the left side.

Cancel the common factor of $- 5$ .

Cancel the common factor.

$\frac{- 5 y}{- 5} = \frac{40}{- 5} + \frac{- 8 x}{- 5}$

Divide $y$ by $1$ .

$y = \frac{40}{- 5} + \frac{- 8 x}{- 5}$

Simplify the right side.

Simplify each term.

Divide $40$ by $- 5$ .

$y = - 8 + \frac{- 8 x}{- 5}$

Dividing two negative values results in a positive value.

$y = - 8 + \frac{8 x}{5}$

Step 2

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.

$y = m x + b$

Reorder $- 8$ and $\frac{8 x}{5}$ .

$y = \frac{8 x}{5} - 8$

Reorder terms.

$y = \frac{8}{5} x - 8$

Step 3

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

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

$m = \frac{8}{5}$

$b = - 8$

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

Slope: $\frac{8}{5}$

y-intercept: $(0, - 8)$

Slope: $\frac{8}{5}$

y-intercept: $(0, - 8)$

Step 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 $- 8$ and $\frac{8 x}{5}$ .

$y = \frac{8 x}{5} - 8$

Reorder terms.

$y = \frac{8}{5} x - 8$

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

$\begin{array}{c} x & y \\ 0 & - 8 \\ 5 & 0 \end{array}$

Step 5

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

Slope: $\frac{8}{5}$

y-intercept: $(0, - 8)$

$\begin{array}{c} x & y \\ 0 & - 8 \\ 5 & 0 \end{array}$

Step 6

Graph 8x-5y=40

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