BAR GRAPHS

The purpose of the bar graph...

Bar graphs display information in a way that helps us to make generalizations and conclusions quickly and easily.

Definition

a diagram in which the numerical values of variables are represented by the height or length of lines or rectangles of equal width.

EXAMPLE

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:

EXAMPLE

A survey of 145 people revealed their favorite fruit:


Fruit:Apple,Orange,Banana,Kiwifruit,Blueberry,Grapes

People:35,30,10,25,40,5


And here is the bar graph:

The advantages and disadvantages

ADVANTAGES:-
1. Beautiful and neatly constructed diagrams/charts are more attractive then simple figures
2. Comparison is made easy and it will save time of the user to make quick comparison of large data.
3. You can record comparison between two things or objects.

DISADVANTAGES:-
1. Graph categories can be reordered to emphasize certain effects
2. Use only with discrete data
3. Limited space for labeling with vertical bar graphs
How To Make and Use a Bar Graph

Types of bar graphs

There are many variations of the bar graph- which is also known as the bar chart. These variations include:

SIMPLE BAR GRAPH

HORIZONTAL BAR GRAPH

RANGE BAR GRAPH

GROUPED BAR GRAPH

COMPOSITE BAR GRAPH

AND

HISTOGRAMS