Algebra Demystified 2nd Ed

Chapter 9 linear inequaliTieS 313

Before we solve inequalities, we will learn how to shade the region on the
number line represented by an inequality.

EXAMPLE

Shade the region on the number line.

x < 0

FIgure 9-5

0

x ≥ 0

FIgure 9-6

0

x > 3

FIgure 9-7

3

x ≤ –2

FIgure 9-8

–2

PRACTICE

Shade the region on the number line.

1. x > 4


2. x > −5


3. x ≤ 1


4. x < −3


5. x ≥ 10

EXAMPLE

Shade the region on the number line.

PRACTICE

Shade the region on the number line.