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Year 8 - Maths

Securing constructing bar charts by hand

Graphical representations of data

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 bar charts from data.

Key Notes

Data presented as a list can be represented as a bar chart
Data presented in a table can be represented as a bar chart
The type of data determines how the bars should be drawn

Vocabulary To Learn

Frequency: The frequency is the number of times an event occurs; or the number of individuals (people, animals etc.) with some specific property.
Bar chart: A bar chart (bar graph) is a graph consisting of bars visually representing the frequency of objects or groups.
Data: Data are a collection of information.

Common Mistakes To Avoid

Pupils may label the vertical axis with the frequency values rather than a scale.

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 list can be represented as a bar chart. Data presented in a table can be represented as a bar chart.

2. Use this key word in a maths sentence and explain it clearly. 'Frequency'

The frequency is the number of times an event occurs; or the number of individuals (people, animals etc.) with some specific property. 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 label the vertical axis with the frequency values rather than a scale. Correction: Remind the pupils that the scale should go up in the same jumps. i.e. 0, 5, 10, 15 etc and have them check theirs.

More Lessons In This Unit

Browse all guides in the Year 8 Maths guide library.