### GCSE Maths Revision: Bar Charts

#### 5th April 2017

GCSE Maths Revision - New Maths Syllabus

Learn the key facts about bar charts to excel in your Maths exam

To get the best results in your GCSE examinations across all exam boards, including WJEC, AQA and OCR, you’ll have to understand bar charts and be able to draw them. This blog has all you need to know about them!

A bar chart displays the frequency of events. This means that it is very similar to the frequency diagram. The difference is that with a bar chart the height (or the y-axis) is the frequency and the width (or the x-axis) is what we are measuring the frequency of. Common examples are customers in a cafe or assessing what are people's favourite types of fruit.

A comparative bar chart does exactly what a bar chart does but has more variables. An example of this could be assessing the number of male and female customers in a cafe.

We’ll go through an example of a comparative bar chart analysing 10 girls and 10 boys favourite juices.

 Orange Apple Lemon Mango Girls 3 2 2 3 Boys 3 5 0 2

This is then represented like this as a comparative bar chart:

Never forget to create a key so the examiner knows which colour bar represents which variable. Also make sure you listen to our bar chart song which has all this information recorded as a memorable piece of music!

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