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  • Data is represented graphically, Pictograph, Bar graph, Double Bar Graph

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In your day-to-day life, you might have come across information, such as: 
(a) Runs made by a batsman in the last 10 test matches. 
(b) Marks scored by the students of your class in the Mathematics unit test. 
(c) Number of story books read by each of your friends etc. 
The information collected in all such cases is called data. Data is usually collected in the context of a situation that we want to study. Sometimes, data is represented graphically to give a clear idea of what it represents. 
There are different types of the graphs are explain following: 
1) A Pictograph:  Pictorial representation of data using symbols.
For example : 

(i) How many cars were produced in the month of July? 
`=>` 250
(ii) In which month were maximum number of cars produced?
`=>` september

2) A bar graph:  A display of information using bars of uniform width, their heights being proportional to the respective values.



3. Double Bar Graph: A bar graph showing two sets of data simultaneously. It is useful for the comparison of the data.

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