Year 8 - Maths
Problem solving with graphical representations of data
Graphical representations of data
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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 use your understanding of various graphical representations to solve problems.
Key Notes
- Data can be presented in various formats.
- A fuller picture can be obtained when considering more data.
- Multiple representations may be unnecessary.
Vocabulary To Learn
- Bar chart: A bar chart (bar graph) is a graph consisting of bars visually representing the frequency of objects or groups.
- Pie chart: A pie chart (pie graph) is a circular graph where sectors represent different groups proportionally.
- Scatter graph: A scatter graph is a visual representation for bivariate data. It can help determine the nature of the relationship between the variables.
Common Mistakes To Avoid
- Pupils may think that data is only presented using the types of graphs that they learn in school.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Data can be presented in various formats. A fuller picture can be obtained when considering more data.
2. Use this key word in a maths sentence and explain it clearly. 'Bar chart'
A bar chart (bar graph) is a graph consisting of bars visually representing the frequency of objects or groups. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may think that data is only presented using the types of graphs that they learn in school. Correction: Data can presented visually in anyway that helps people to understand it. Explore other types of graphs and infographics used in the media.
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 Study Guide
- Constructing scatter graphs by utilising technology Study Guide
- Interpreting pie charts Study Guide
- Interpreting scatter graphs Study Guide
- Securing constructing bar charts by hand Study Guide
- Securing constructing pictograms Study Guide
Browse all guides in the Year 8 Maths guide library.