Graph 2x+y<-3 2x-y<=-1

$2 x + y < - 3$ $2 x - y \leq - 1$

Step 1

Graph $2 x + y < - 3$ .

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

Subtract $2 x$ from both sides of the inequality.

$y < - 3 - 2 x$

Rearrange terms.

$y < - 2 x - 3$

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 $y = m x + b$ .

$m = - 2$

$b = - 3$

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

Slope: $- 2$

y-intercept: $(0, - 3)$

Slope: $- 2$

y-intercept: $(0, - 3)$

Graph a dashed line, then shade the area below the boundary line since $y$ is less than $- 2 x - 3$ .

$y < - 2 x - 3$

Step 2

Graph $2 x - y \leq - 1$ .

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

Solve for $y$ .

Subtract $2 x$ from both sides of the inequality.

$- y \leq - 1 - 2 x$

Divide each term in $- y \leq - 1 - 2 x$ by $- 1$ and simplify.

Divide each term in $- y \leq - 1 - 2 x$ by $- 1$ . When multiplying or dividing both sides of an inequality by a negative value, flip the direction of the inequality sign.

$\frac{- y}{- 1} \geq \frac{- 1}{- 1} + \frac{- 2 x}{- 1}$

Simplify the left side.

Dividing two negative values results in a positive value.

$\frac{y}{1} \geq \frac{- 1}{- 1} + \frac{- 2 x}{- 1}$

Divide $y$ by $1$ .

$y \geq \frac{- 1}{- 1} + \frac{- 2 x}{- 1}$

Simplify the right side.

Simplify each term.

Divide $- 1$ by $- 1$ .

$y \geq 1 + \frac{- 2 x}{- 1}$

Move the negative one from the denominator of $\frac{- 2 x}{- 1}$ .

$y \geq 1 - 1 \cdot (- 2 x)$

Rewrite $- 1 \cdot (- 2 x)$ as $- (- 2 x)$ .

$y \geq 1 - (- 2 x)$

Multiply $- 2$ by $- 1$ .

$y \geq 1 + 2 x$

Rearrange terms.

$y \geq 2 x + 1$

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 $y = m x + b$ .

$m = 2$

$b = 1$

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

Slope: $2$

y-intercept: $(0, 1)$

Slope: $2$

y-intercept: $(0, 1)$

Graph a solid line, then shade the area above the boundary line since $y$ is greater than $2 x + 1$ .

$y \geq 2 x + 1$

Step 3

Plot each graph on the same coordinate system.

$2 x + y < - 3$

$2 x - y \leq - 1$

Step 4

Graph 2x+y<-3 2x-y<=-1

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