e x p l o r at i o n
2-1
Graphing and Writing
Inequalities
You can use a number line to help you see relationships
among numbers.
1. Plot the following numbers on the number line:
25, 6, 23.5, 0, 1.5, 22, 27.
2. Which of the numbers that you plotted are greater than or
equal to 25?
3. Name and plot three additional numbers that are greater than
or equal to 25.
4. Draw a ray connecting all the numbers that are greater than
or equal to 25.
10 8 6 4 2
0
2
4
6
8
10
Think and Discuss
5. Describe how the ray would be different if you plot and
connect numbers that are less than or equal to 25.
6. Explain how you could draw a ray to show all numbers that
1 ​.
are greater than or equal to 4​ __
2
Copyright © by Holt McDougal.
All rights reserved.
11
Holt McDougal Algebra 1
e x p l o r at i o n
2-1
Graphing and Writing
Inequalities
You can use a number line to help you see relationships
among numbers.
1. Plot the following numbers on the number line:
25, 6, 23.5, 0, 1.5, 22, 27.
0
7 6 5 4 3 2 1
1
2
3
4
5
6
7
2. Which of the numbers that you plotted are greater than or
equal to 25? 25, 6, 23.5, 0, 1.5, 22
3. Name and plot three additional numbers that are greater than
or equal to 25. Possible answer: 21, 4, 9
7 6 5 4 3 2 1
0
1
2
3
4
5
6
7
4. Draw a ray connecting all the numbers that are greater than
or equal to 25.
0
10 8 6 4 2
2
4
6
8
10
Think and Discuss
5. Describe how the ray would be different if you plot and
connect numbers that are less than or equal to 25. The ray
would point in the opposite direction.
6. Explain how you could draw a ray to show all numbers that
1 ​. Plot 4_​ 1​, and then draw a ray that points
are greater than or equal to 4​ __
2
to the right and has its endpoint at 4_
​ 1.​ 2
2
Copyright © by Holt McDougal.
All rights reserved.
11
Holt McDougal Algebra 1