Page 134 - Maths Class 06

7. The follow ing table shows the daily produc tion mobile sets in an indus try for 7 days of a week:

Days Mon Tue Wed Thu Fri Sat Sun

Number of
Mobile sets 300 400 150 250 100 350 200

Represent the above information by a pictograph.
8. The following table shows the number of bikes sold by five dealers in a particular month:

Dealer Saya Bagga Ajay Bhasin Competent
Links automobiles automobiles automobiles

Bikes Sold 60 40 20 15 10

Represent the above information by a pictograph.

Bar Graphs
A bar graph is a pictorial representation of the numerical data by a number of bars (rectangles) of uniform
width created horizontally or vertically with equal spacing between them. In it each rectangle or bar
represent 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 of each bar represents the given numbers.

Drawing a Bar Graph

To draw a bar graph, we draw two perpendicular lines on a square grid paper. The horizontal line drawn
is called X-axis and the vertical line drawn is called Y-axis. The bars can be shaded, hatched or coloured.

NOTE

In a Bar Graph:
The width of the bars should be kept uniform throughout.
The space between the two consecutive bars should be kept uniform throughout.
In it, vertical bars are prepared as they give a better look.

Properties of Bar Graphs

1. Bars can be either horizontal or vertical.
2. The height or length of a bar represents the numerical value of the data.

3. The width of each bar is kept same, though it is merely for attraction.
4. The distance between any two consecutive bars should be equal.
5. Bars can be shaded, hatched or coloured to make them look attractive.

6. Bar graphs are of the dimension. Only their height is of scale significance.
EX AM PLE 1. The pop u la tion re corded in six vil lages was as given in the ta ble be low:

Village A B C D E F

Population 300 500 400 350 500 450

Represent the data by a bar graph.

134