LINE PLOT
Definition Of Line Plot
A line plot shows data on a number line with x or other marks to show frequency.
Example of Line Plot
The line plot below shows the test scores of 26 students.
The count of cross marks above each score represents the number of students who obtained the respective score.
Video Examples: Line Plot
Solved Example on Line Plot
Ques: Which of the line plots represents the prices of different story books given below? $10, $30, $10, $10, $20, $30, $50, $40, $45, $50, $10, $30, $35, $30, $20, $40, $50
Choices:
A. Figure 1
B. Figure 2
Correct Answer: A
Solution:
Step 1: First arrange the data items from least to greatest. $10, $10, $10, $10, $20, $20, $30, $30, $30, $30, $35, $40, $40, $45, $50, $50, $50
Step 2: Now group the data items that are the same.
4 story books cost $10
2 story books cost $20
4 story books cost $30
1 story book costs $35
2 story books cost $40
1 story book costs $45
3 story books cost $50
Step 3: Match the grouped data items with the figures shown. Figure-1 represents the data correctly.
Quick Summary
- Line plots display frequency of data along a number line.
- Each 'x' or mark represents one data point.
- Line plots help visualize the distribution of data.
⚠️ Common Mistakes
- Miscounting the number of 'x's above each data point.
- Incorrectly placing data points on the number line.
- Misinterpreting the scale of the number line.
🌍 Real-World Uses
- Tracking the number of books read by students in a class, displaying how many students read 1 book, 2 books, etc.
- Recording the daily high temperatures for a month, showing the frequency of each temperature.
- Analyzing the number of siblings each student in a school has to understand family sizes within the community.
📋 Standards Alignment
CCSS.MATH.CONTENT.2.MD.D.9CCSS.MATH.CONTENT.3.MD.B.4
🔗 Related Links
🍎 Teacher Insights
Use real-world examples like the number of siblings each student has or the scores on a recent quiz to make line plots more engaging.🎓 Prerequisites
- Counting
- Number recognition
- Basic data interpretation
Check Your Knowledge
Q1: Which number appears most frequently in the following line plot: (imagine a line plot with x's above 10, 20, 30, etc.)?
Q2: How many data points are represented in a line plot if there are a total of 15 'x's?
Frequently Asked Questions
Q: What is the purpose of a line plot?
A: To visualize and understand the distribution of data.
Q: How do you create a line plot?
A: Draw a number line, mark the data values, and place an 'x' or mark above each value for each occurrence.