Pre-Algebra Examples

$x + y < 12$

Step 1

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

Tap for more steps...

Step 1.1

Subtract $x$ from both sides of the inequality.

$y < 12 - x$

Step 1.2

Rearrange terms.

$y < - x + 12$

Step 2

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

Tap for more steps...

Step 2.1

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

$y = m x + b$

Step 2.2

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

$m = - 1$

$b = 12$

Step 2.3

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

Slope: $- 1$

y-intercept: $(0, 12)$

Slope: $- 1$

y-intercept: $(0, 12)$

Step 3

Graph a dashed line, then shade the area below the boundary line since $y$ is less than $- x + 12$ .

$y < - x + 12$

Step 4