Year 8 - Maths
Constructing scatter graphs
Graphical representations of data
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Study Guides
This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will interpret and construct a range of representations of data including bar charts, pie charts and scatter graphs.
Lesson Summary
You will learn to construct scatter graphs from data presented in a number of different ways.
Key Notes
- Data presented as a paired list can be represented as a scatter graph.
- Data presented in a table can be represented as a scatter graph.
- The independent variable is placed on the horizontal axis.
Vocabulary To Learn
- Scatter graph: A visual representation for bivariate data. It can be useful when determining the nature of the relationship between the two variables.
- Independent/Explanatory: An independent (explanatory) variable is a measure that is predicted to have an effect on another variable
- Dependent/Response: A dependent (response) variable is a measure whose value is predicted to be affected by an explanatory variable
- Bivariate data: Bivariate data has two variables, where each data point for one variable has a corresponding data point for the other variable.
Common Mistakes To Avoid
- Task B Q2 - Pupils may choose to go up in 100s on the vertical axis.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Data presented as a paired list can be represented as a scatter graph. Data presented in a table can be represented as a scatter graph.
2. Use this key word in a maths sentence and explain it clearly. 'Scatter graph'
A visual representation for bivariate data. It can be useful when determining the nature of the relationship between the two variables. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Task B Q2 - Pupils may choose to go up in 100s on the vertical axis. Correction: Highlight that all of their data points will be in the bottom half of the graph and suggest going up in 50s.
More Lessons In This Unit
- Checking understanding of pictograms and bar charts Study Guide
- Constructing bar charts by utilising technology Study Guide
- Constructing pie charts Study Guide
- Constructing pie charts by utilising technology Study Guide
- Constructing scatter graphs by utilising technology Study Guide
- Interpreting pie charts Study Guide
- Interpreting scatter graphs Study Guide
- Problem solving with graphical representations of data Study Guide
- Securing constructing bar charts by hand Study Guide
- Securing constructing pictograms Study Guide
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