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Bar graphs review

Bar graphs are a nice way to visualize categorical data. This article reviews how to create and read bar graphs.
A bar graph is a nice way to display categorical data.
For example, imagine a P.E. teacher has 4 soccer balls, 4 footballs, 7 tennis balls, and 8 volleyballs. We can display this data in a bar graph:
Notice how the height of the bar above "soccer" is 4 units to show that there are 4 soccer balls. And the bar above "tennis" is 7 units high to show that there are 7 tennis balls. The "football" and "volleyball" bars work in the same way.
Want to learn more about bar graphs? Check out this video.

Practice set 1: making bar graphs

Problem 1.A
There are 4 purple, 5 yellow, 2 green, and 9 red lunch boxes.
Make a bar graph for this data.

Want to practice more problems like these? Check out this exercise.

Practice set 2: reading bar graph

Problem 2.A
The music store sells trumpets, flutes, and drums.
This bar graph shows how many of each instrument are at the store.
How many more trumpets are there than flutes?
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0.75
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
more trumpets

Want to practice more problems like these? Check out this exercise and this more advanced exercise.

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