There are many types of graphs. This lesson will show you how to identify some of them. Learning to read and create graphs are very useful skills in mathematics.
The graph above has a title and a scale. Let us say that the circles were drawn by David, Peter, John, Brown, and Jennifer.
The title of this pictograph is "Number of circles drawn"
The scale that the pictograph is using is this: One circle represents 5 circles.
Having said that we can make the following observations:
David drew 15 circles since we have 3 circles and each circle represents 5 circles (5 times 3 = 15).
John drew 7.5 circles. How did we get 7.5?
Note that if a circle represents 5 circles, half a circle will represent 5/2 circles or 2.5 circles. Add 5 circles to 2.5 circles to get 7.5 circles.
Jennifer drew 20 circles since we have 4 circles and each circle represents 5 circles (5 times 4 = 20).
Construct a pictograph with the following table
You can follow this guideline in order to construct the pictograph.
Suppose for instance, you were dealing with very big numbers such as hundreds of drivers in a city, you could have used 1 face to represent 100 drivers.
Here is the pictograph.