Bar Graph


 
 
Concept Explanation
 

Bar Graph

Bar Graph: 

A bar graph is a pictorial representation of the numerical data by a number of bars (rectangle) of uniform width erected horizontally or vertically with equal spacing between them. Each rectangle or bar represents only one value of the numerical data and so there are as many bars as the number of values in the numerical data. The height or length of a bar indicates on a suitable scale the corresponding value of the numerical data.

Properties Of Bar Graph:

  • Each column is of equal width.
  • There is equal space between each column.
  • The height of each column indicates the value of data.
  • All bars or columns are drawn on the same common base.
  • Steps in construction of Bar Graphs / Column Graph: 

    Step 1: On a graph, draw two lines perpendicular to each other, intersecting at O (Origin). The horizontal line is x-axis and vertical line is y-axis.

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    Sample Questions
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    Question : 1

    P, Q and R are three shops selling computers. The sales made by shop P is large frac{2}{3} of the sales made by shop R. The volume of sales by shop Q is twice the volume made by shop P. Shop R sold 600 computers. Which of the following bar charts correctly re[resent the sales of computers by shops P, Q and R.

    Right Option : A
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    Explanation
    Question : 2

    What is the average sales of all the branches (in thousand numbers) for the year 2000?

    Right Option : C
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    Explanation
    Question : 3

    Students that live between 0.0 - 0.9 km must walk to school. If the remaining students take buses, how many student ride buses?

    Right Option : C
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    Explanation
     
     


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