Bar charts
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Geometry - position and direction
Geometry - properties of shapes
Measurement
Fractions
Multiplication and division
Addition and subtraction
Explainer Video
Summary
Bar Charts
In a nutshell
Bar charts help you to visualise data at a glance. They make information involving 'how many' easy to compare and understand.
Definitions
Frequency | How many of something. |
scale | The amount that the frequency axis goes up in. |
Interpreting bar charts
A bar chart has two labelled axes: one for frequency and one for categories. The height of each bar represents the frequency of items in that category.
Example 1
Bar chart to show students' favourite animals
Note: The scale of a bar chart could be anything from ones to twos to hundreds to thousands!
Presenting data using bar charts
You can draw a bar chart from a table to present the data in a more visual way.
Drawing bar charts
procedure
1. | Draw and label the axes: one for frequency and one for the categories. |
2. | Pick an appropriate scale for the frequency. |
3. | Draw the bars so that their height represents the right frequency. |
Example 2
Here the bar chart has been drawn from the tally chart shown below.
| Bar chart to show carrots eaten by a rabbit on each day of the week.  |
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Exercises
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FAQs - Frequently Asked Questions
How do I draw a bar chart?
1. Draw and label the axes: one for frequency and one for the categories. 2. Pick an appropriate scale for the frequency. 3. Draw the bars so that their height represents the right frequency.
What are bar charts?
Bar charts help you to visualise data at a glance. They make information involving 'how many' easy to compare and understand.
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