
Types of graphs
There are many types of graphs.Learning to read and create graphs is a very useful skill
In this unit, you will learn about pictographs, bar graphs,double bar graphs,line graphs, and circle graphs.
Let us start with pictographs:
A graph is a visual way to display information.
A pictograph is a graph that uses pictures or symbols to display information.
The pictures in a pictograph usually represent more than one item.
The following is a pictograph:
The graph above has a title and a scale. Let say that the circles were drawn by David, Peter, John, Brown, and Jennifer.
The title is "number of circles drawn"
The scale used is the following: one circle represents 5 circles.
David drew 15 circles since we have 3 circles and each circle represents 5 circles.
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, give 7.5
Exercise:
Construct a pictograph with the following table:
Here is the pictographs:

