1. bar graph
Subject-Math'S
School-Kendriya Vidyalaya

2. DATA !!
the inforMation colleted in
the caSe iS called data.
Types of DATA
1. PriMary data.
2. Secondary data.

3. primary data & secondary data
 When an inVeStigator collectS data
hiMSelf With a definite Plan or deSign
in hiS/her Mind, it iS called PriMary
data.
 data Which are not originally
collected by the inVeStigator but
they are obtained froM PubliShed or
unPubliShed SourceS are KnoWn aS
Secondary data.

4. What is graph ???
 a diagraM that ShoWS relationShiPS
betWeen nuMberS. graPhS arrange
nuMerical inforMation into a Picture
froM Which it iS often PoSSible to See
oVerall PatternS or trendS in the
inforMation iS called graPh.

5. Types of graph
frequency
There are Three Types of graphs:1. Bar graph.
2. DouBle Bar graph.
3. picTograph.
6
5
4
3
1
0
1
40
35
30
25
Aj y
a
20
Aj y2
a
15
10
5
0
1
2
3
4
5
6
frequency
2
3
5
7
9
11
13
15
17
19

6. What is bar graph ???
•a
Bar
graph
is
a
picTorial
represenTaTion of The numerical DaTa
By a numBer of Bars of uniform wiDTh
erecTeD horizonTally or verTically wiTh
equally spacing BeTween Them.
frequency
6
5
4
3
frequency
2
1
0
1
3
5
7
9
11
13
15
17
19

7. Example of bar graph.
q. in a class of 30 pupils, The
maThemaTics Teacher creaTes The
TaBle Below ThaT gives The scores
The pupils geT in a TesT (The Teacher
scores The TesT from 0 To 20, anD all
The scores are whole numBers) Draw
a Bar graph ?

8. frequency
Solution.
6
5
4
3
frequency
2
1
0
1
3
5
7
9
11
13
15
17
19

9. What is double bar graph.
A bAr grAph showing two sets of dAtA
simultAneously.
it
is
useful
for
compArison of dAtA.
40
35
30
25
Ajay
20
Ajay2
15
10
5
0
1
2
3
4
5
6

10. Example of double bar graph.
40
35
30
25
Ajay
20
Ajay2
15
10
5
0
1
2
3
4
5
6
Name
Ajay
English Hindi Maths Sst.
35
35
32
29
Skt
39
Science
39
Ajay2
39
35
30
32
35
29

11. What is Pictograph ???
• A pictogrAph pictoriAl
representAtion of dAtA using
symbols.

12. Example of Pictograph.
=100 cars one symbol stand for 100 cars
50 cars
July
= 250
August
=300
September
=400

13. $ THANKS FOR YOUR
KIND
CONSIDERATION $
# Made. By –
ajay KuMar #