## Line Plots

### Johnny WolfeSanta Rosa District Schools

#### Description

Statistical data can be organized and presented on a number line. Numerical information displayed on a number line is called a “line plot.”

#### Objectives

Interprets data that has been collected, organized, and displayed in charts, tables, plots.

#### Materials

- Overhead transparencies (if examples are to be worked on overhead) for Line Plots (see attached file).
- Line Plots Examples (see attached file).
- Line Plots Worksheet (see attached file).
- Line Plots Checklist (see attached file).

#### Preparations

1. Prepare transparencies (if teacher uses overhead for examples) for Line Plots Examples(see attached file.)

2. Have marking pens (for overhead).

3. Have Line Plots Examples (see attached file) prepared and ready to demonstrate to students.

4. Have enough copies of Line Plots Worksheet (see attached file) for each student.

5. Have enough copies of Line Plots Checklist (see attached file) for each student.

#### Procedures

Prior Knowledge: Students should be familiar with basic operation skills such as addition, subtraction, multiplication, division, rounding and reading tables. Note: Displaying charts and tables will not be assessed.

1. Introduce student to the term “line plot.” Give students examples of a line plot (see # 1 on attached file Line Plots Examples.) Answer student questions and comments.

2. Show students an example of a table and how the table is placed on a number line. Point out that graphs do not have to start with zero (see # 2 on attached file Line Plot Examples.) Answer student questions and comments.

3. Have students discuss what information can be gained from a line plot (see # 3 on attached file Line Plot Examples.) Answer student questions and comments.

4. Discuss the possibility of using different symbols to distinguish between sets of data on the same line plot (see # 4 on attached file Line Plots Examples.) Answer student questions and comments.

5. Work Example # 5 (see attached file Line Plots Examples.) Answer student questions and comments.

6. Show students how to look at a line plot to analyze data (see # 6 on attached file Line Plots Examples.) Answer student questions and comments.

7. Work Example # 7 (see attached file Line Plots Examples.) Answer student questions and comments.

8. Distribute the Line Plots Worksheet (see attached file.)

9. Distribute the Line Plots Checklist(see attached file.) Describe what constitutes an “A,” “B,” “C,” “D,” and an “F” in the Checklist.

10. The students will write their responses on the worksheet.

11. Move from student to student observing the students work and lending assistance.

#### Assessments

The student worksheet will be collected and scored according to the Line Plots Checklist (see attached file.)

#### Extensions

Give the enrollment per class (9th, 10th, 11th, and 12th) from three high schools in table form. Using the enrollment for each high school as separate sets of data, make a line plot that differentiates between each set.