Bar Graphs
A Bar Graph (also called Bar Chart) is a graphical display of data using bars of different heights.
Imagine you just did a survey of your friends to find which kind of movie they liked best:
| Table: Favorite Type of Movie | ||||
| Comedy | Action | Romance | Drama | SciFi |
|---|---|---|---|---|
| 4 | 5 | 6 | 1 | 4 |
We can show that on a bar graph like this:
It is a really good way to show relative sizes: we can see which types of movie are most liked, and which are least liked, at a glance.
We can use bar graphs to show the relative sizes of many things, such as what type of car people have, how many customers a shop has on different days and so on.
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