solving and graphing inequalities on the number line
September 07, 2012
NO
To the
right
of the 4.
YES
Graphing Inequalities on the Number Line
Graph the inequality x
≥
4
Is the number 4 included in the solution set?
To show this, we place a SOLID
CIRCLE on the number 4 on the
number line.
1
0
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
1
0
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
Now, where on the number line, are all of the
numbers which are GREATER THAN 4?
To show this, we place an arrow
pointing to the right from the 4.
Graph the inequality x
>
1
Is the number 1 included in the solution set?
To show this, we place an
OPEN CIRCLE on the
number 1 on the number line.
1
0
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
1
0
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
The arrow still points to the right.
In interval notation, we write this as
[4,
∞
)
In interval notation, we write this as
(1,
∞
)
Graph the inequality x ≤ 2
Is the number 2 included in the solution set?
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 Fall '12
 Mrs.Cella
 Inequalities

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