Download Name: Date: ______ Math 9 Chapter 6 Linear Equations and

Name: ______________________
Date: _____________
Math 9 Chapter 6 Linear Equations and Inequalities
Lesson 3 – 6.3 Introductions to Linear Inequalities
Focus: to write and graph inequalities
We use an inequality sign to represent a range of numbers rather than a single number.
Example 1:
Is each number a solution of the inequality
a) 0
b) -9
Solution
c  7 ? Justify your answers.
c) -7
d) -6.5
Use a number line to show all the numbers
Example 2: Graphing Inequalities on a Number Line
Graph each inequality on a number line and write four numbers that are
solutions of the inequality.
a)
b)
v > -4
g ≤ 1.5
c)
3  y
Example 3:
a) Graph the solution of
–5 –4 –3 –2 –1 0
on a number line.
1
2
3
4
5
w
b) Graph the solutions to these two inequalities on the same number line.
and
–10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0
1
2
Example 4:
Write the inequality that is graphed on each number line.
a)
b)
c)
Assignments: Pg.292 Q 8, 9, 11, 12, 13
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4
5
6
7
8
9 10
x