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BAR GRAPHS

Great summary of bar graphs and useful terms:

 

Bar Graphs

Bar Graph – A special graph that uses bars to show relative sizes of data 

Imagine you just did a survey of your friends to find which kind of movie they liked best.

Here are the results:

Table: Favorite Type of Movie
Comedy Action Romance Drama SciFi
4 5 6 1 4

You could show that on a bar graph like this:

Favorite Movies

It is a really good way to show relative sizes: it is easy to see which types of movie are most liked, and which are least liked, at a glance.

You can use bar graphs to show the relative sizes of many things, such as what type of car people have, how many cutomers a shop has on different days and so on.

Example: Student Grades

In a recent test, this many students got the following grades:

Grade: A B C D
Students: 4 12 10 2

And here is the bar graph:

Bar Chart Example

Taken from: http://www.mathsisfun.com/data/bar-graphs.html