Graph x-y>=4 x+5y<=0

$x - y \geq 4$ $x + 5 y \leq 0$

Step 1

Graph $x - y \geq 4$ .

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

Solve for $y$ .

Subtract $x$ from both sides of the inequality.

$- y \geq 4 - x$

Divide each term in $- y \geq 4 - x$ by $- 1$ and simplify.

Divide each term in $- y \geq 4 - x$ by $- 1$ . When multiplying or dividing both sides of an inequality by a negative value, flip the direction of the inequality sign.

$\frac{- y}{- 1} \leq \frac{4}{- 1} + \frac{- x}{- 1}$

Simplify the left side.

Dividing two negative values results in a positive value.

$\frac{y}{1} \leq \frac{4}{- 1} + \frac{- x}{- 1}$

Divide $y$ by $1$ .

$y \leq \frac{4}{- 1} + \frac{- x}{- 1}$

Simplify the right side.

Simplify each term.

Divide $4$ by $- 1$ .

$y \leq - 4 + \frac{- x}{- 1}$

Dividing two negative values results in a positive value.

$y \leq - 4 + \frac{x}{1}$

Divide $x$ by $1$ .

$y \leq - 4 + x$

Rearrange terms.

$y \leq x - 4$

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

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

$y = m x + b$

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

$m = 1$

$b = - 4$

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

Slope: $1$

y-intercept: $(0, - 4)$

Slope: $1$

y-intercept: $(0, - 4)$

Graph a solid line, then shade the area below the boundary line since $y$ is less than $x - 4$ .

$y \leq x - 4$

Step 2

Graph $x + 5 y \leq 0$ .

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

Solve for $y$ .

Subtract $x$ from both sides of the inequality.

$5 y \leq - x$

Divide each term in $5 y \leq - x$ by $5$ and simplify.

Divide each term in $5 y \leq - x$ by $5$ .

$\frac{5 y}{5} \leq \frac{- x}{5}$

Simplify the left side.

Cancel the common factor of $5$ .

Cancel the common factor.

$\frac{5 y}{5} \leq \frac{- x}{5}$

Divide $y$ by $1$ .

$y \leq \frac{- x}{5}$

Simplify the right side.

Move the negative in front of the fraction.

$y \leq - \frac{x}{5}$

Reorder terms.

$y \leq - (\frac{1}{5} x)$

Remove parentheses.

$y \leq - \frac{1}{5} x$

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

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

$m = - \frac{1}{5}$

$b = 0$

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

Slope: $- \frac{1}{5}$

y-intercept: $(0, 0)$

Slope: $- \frac{1}{5}$

y-intercept: $(0, 0)$

Graph a solid line, then shade the area below the boundary line since $y$ is less than $- \frac{1}{5} x$ .

$y \leq - \frac{1}{5} x$

Step 3

Plot each graph on the same coordinate system.

$x - y \geq 4$

$x + 5 y \leq 0$

Step 4

Graph x-y>=4 x+5y<=0

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