Graph f(x)<0

$f (x) < 0$

Step 1

Find the slope and the y-intercept for the boundary line.

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.

$y = m x + b$

Subtract $f (x)$ from both sides of the inequality.

$0 < - f (x)$

The equation is not linear, so a constant slope does not exist.

Not Linear

Step 2

Graph a dashed line, then shade the area below the boundary line since $y$ is less than $0$ .

$f (x) < 0$

Step 3