The following data gives the amount spent on the construction of a house. Draw a pie chart. Item Cement Timber Bricks Labour Steel Misc. Expenditure (in thousands) 75 40 50 70 50 75

Given data, Item Cement Timber Bricks Labour Steel Misc. Expenditure (in thousands) 75 40 50 70 50 75 Sum of expenditure = 75 + 40 + 50 + 70 + 50 + 75 = 360 . Central angle for a component = value of the component Total value × 360 ° The table showing the computation of central angles is as under: Item Cement Timber Bricks Labour Steel Misc. Expenditure (in thousands) 75 40 50 70 50 75 Measure of central angle 75 360 × 360 o = 75 ° 40 360 × 360 o = 40 ° 50 360 × 360 o = 50 ° 70 360 × 360 o = 70 ° 50 360 × 360 o = 50 ° 75 360 × 360 o = 75 ° Draw a circle of any convienient radius. Now divide the interior of this circle into sectors of angles 75 ° , 40 ° , 50 ° , 70 ° , 50 ° and 75 ° with help of your protractor. Hence, the pie chart is drawn as,

The expenditure of a firm under different heads in term of percentage expenditure is given below. Draw a pie chart. Items Wages Rent Maintenance Miscellaneous Percentage 50 25 12.5 12.5

Given data, Items Wages Rent Maintenance Miscellaneous Percentage 50 25 12.5 12.5 The Total percentage is 50 + 25 + 12 . 5 + 12 . 5 = 100 Central angle for a component = value of the component Total value × 360 ° The table showing the computation of central angles is as under: Items Wages Rent Maintenance Miscellaneous Percentage 50 25 12.5 12.5 Angles 50 100 × 360 = 180 o 25 100 × 360 = 90 o 12.5 10 × 360 = 45 o 12.5 100 × 360 = 45 o Draw a circle of any convenient radius. Now divide the interior of this circle into sectors of angles 180 ° , 90 ° , 45 ° and 45 ° with help of your protractor. Hence, the pie chart is drawn as,

The number of students interested in taking part in various hobbies from class 7 of a particular school is as under. Hobby Music Pottery Dance Drama Social service Number of students 20 25 27 28 20 Represent the above data by Bar graph

Given data, Hobby Music Pottery Dance Drama Social service Number of students 20 25 27 28 20 A bar graph is a pictorial representation of the numerical data by a number of bars of uniform width, erected horizontally or vertically with equal spacing between them. Step 1 : Choose a scale. The largest data value is 28 , so start the scale at 0 and extend it to a value greater than 28 , such as 30 . Step 2 : Use the data to determine the lengths of the bars. Draw bars of equal width. The bar should not touch. Step 3 : Title the graph as Hobbies of students and label the x-axis and y-axis as Hobby and number of students respectively. Thus, the bar graph can be constructed as,

The number of students interested in taking part in various hobbies from class 7 of a particular school is as under. Hobby Music Pottery Dance Drama Social service Number of students 20 25 27 28 20 Represent the above data by Line Graph.

Given data, Hobby Music Pottery Dance Drama Social service Number of students 20 25 27 28 20 In a line graph, points are plotted on a graph paper with the help of two variables i.e, one along the x -axis and the other along y -axis. Then these points are joined in pairs by lines to obtain line graphs. Take Subjects along the x -axis and Number of students along the y -axis. Take Scale on y -axis as 1 cm = 5 students. Plot the points Music , 20 , Pottery , 25 , Dance , 27 , Drama , 25 , Commerce , 40 and join them by line segments as shown.

The number of students interested in taking part in various hobbies from class 7 of a particular school is as under. Hobby Music Pottery Dance Drama Social service Number of students 20 25 27 28 20 Represent the above data by Pie chart.

Given data, Hobby Music Pottery Dance Drama Social service Number of students 20 25 27 28 20 The Total percentage is 20 + 25 + 27 + 28 + 20 = 120 Central angle for a component = value of the component Total value × 360 ° The table showing the computation of central angles is as under: Hobby Music Pottery Dance Drama Social service Number of students 20 25 27 28 20 percentage 20 120 × 360 = 60 o 25 120 × 360 = 75 o 27 120 × 360 = 81 o 28 120 × 360 = 84 o 20 120 × 3260 = 60 o Draw a circle of any convenient radius. Now divide the interior of this circle into sectors of angles 60 ° , 75 ° , 81 ° , 84 ° and 60 ° with help of your protractor. Hence, the pie chart is drawn as,

Make a bar graph of the data. Wingspans of Birds Birds Wingspan Seagull 1.7 m Andean condor 3.2 m Golden eagle 2.5 m Grey heron 1.7 m Gannet 1.7 m

Given data, Wingspans of Birds Birds Wingspan Seagull 1.7 m Andean condor 3 . 2 m Golden eagle 2.5 m Grey Heron 1.7 m Gannet 1.7 m A bar graph is a pictorial representation of the numerical data by a number of bars of uniform width, erected horizontally or vertically with equal spacing between them. Step 1 : Choose a scale. The largest data value is 3 . 2 m , so start the scale at 0 and extend it to a value greater than 3 . 2 m , such as 4 . 0 m . Step 2 : Use the data to determine the lengths of the bars. Draw bars of equal width. The bar should not touch. Step 3 : Title the graph as Wingspans of different birds and label the x and y axis as Birds and Wingspan respectively. Thus, the bar graph can be constructed as,

Make a bar graph of the data. School Days per year Country School Days Belgium 175 Japan 243 Nigeria 190 South Korea 225 United States 180

Given data, School Days per year Country School Days Belgium 175 Japan 243 Nigeria 190 South Korea 225 United States 180 A bar graph is a pictorial representation of the numerical data by a number of bars of uniform width, erected horizontally or vertically with equal spacing between them. Step 1 : Choose a scale. The largest data value is 243 , so start the scale at 0 and extend it to a value greater than 243 , such as 250 . Step 2 : Use the data to determine the lengths of the bars. Draw bars of equal width. The bar should not touch. Step 3 : Title the graph as School Days per year and label the x and y axis as Country and School days per year respectively. Thus, the bar graph can be constructed as,

On a holiday, a man notes every hour how many litres of petrol are left in the tank of the car. The table lists his results. Time 10 : 00 11 : 00 12 : 00 13 : 00 14 : 00 15 : 00 16 : 00 17 : 00 Number of litres 30 25 17.5 12 40 40 32 25 Choosing suitable scale, draw a line graph to show the information in the table. From your graph, find during which hour most petrol was used.

Given data, Time 10 : 00 11 : 00 12 : 00 13 : 00 14 : 00 15 : 00 16 : 00 17 : 00 Number of litres 30 25 17.5 12 40 40 32 25 In a line graph, points are plotted on a graph paper with the help of two variables i.e, one along the x -axis and the other along y -axis. Then these points are joined in pairs by lines to obtain line graphs. Take Subjects along the x -axis and Number of students along the y -axis. Take Scale on y -axis as 1 cm = 10 litres. Plot the points 10 : 00 , 30 , 11 : 00 , 25 , 12 : 00 , 17 . 5 , 13 : 00 , 12 , 14 : 00 , 40 , 15 : 00 , 40 16 : 00 , 32 , 17 : 00 , 25 and join them by line segments as shown. From the graph, we can see that points at 15 : 00 has value 40 and 16 : 00 has value 32 . Amount of petrol used = 40 - 32 = 8 litres. Most petrol was used between 15.00 and 16.00 i.e. 8 litres.

MEDIUM

7th ICSE

IMPORTANT

Earn 100

The number of students in a hostel speaking different languages is given below. Represent the data in a pie chart.

Languages Hindi English Marathi Tamil Bengali Total

Number of students $40$ $10$ $8$ $8$ $6$ $72$

Languages	Hindi	English	Marathi	Tamil	Bengali	Total
Number of students	$40$	$10$	$8$	$8$	$6$	$72$

Important Questions on Graphical Representation of Data

MEDIUM

7th ICSE

IMPORTANT

New Mathematics Today Class 7>Chapter 24 - Graphical Representation of Data>Exercise>Q 9

The following data gives the amount spent on the construction of a house. Draw a pie chart.

Item	Cement	Timber	Bricks	Labour	Steel	Misc.
Expenditure (in thousands)	$75$	$40$	$50$	$70$	$50$	$75$

MEDIUM

7th ICSE

IMPORTANT

New Mathematics Today Class 7>Chapter 24 - Graphical Representation of Data>Exercise>Q 10

The expenditure of a firm under different heads in term of percentage expenditure is given below. Draw a pie chart.

Items	Wages	Rent	Maintenance	Miscellaneous
Percentage	$50$	$25$	$12.5$	$12.5$

MEDIUM

7th ICSE

IMPORTANT

New Mathematics Today Class 7>Chapter 24 - Graphical Representation of Data>Exercise>Q 11

The number of students interested in taking part in various hobbies from class

7

of a particular school is as under.

Hobby	Music	Pottery	Dance	Drama	Social service
Number of students	$20$	$25$	$27$	$28$	$20$

Represent the above data by Bar graph

MEDIUM

7th ICSE

IMPORTANT

New Mathematics Today Class 7>Chapter 24 - Graphical Representation of Data>Exercise>Q 11

The number of students interested in taking part in various hobbies from class $7$ of a particular school is as under.

Hobby	Music	Pottery	Dance	Drama	Social service
Number of students	$20$	$25$	$27$	$28$	$20$

Represent the above data by Line Graph.

MEDIUM

7th ICSE

IMPORTANT

New Mathematics Today Class 7>Chapter 24 - Graphical Representation of Data>Exercise>Q 11

The number of students interested in taking part in various hobbies from class $7$ of a particular school is as under.

Hobby	Music	Pottery	Dance	Drama	Social service
Number of students	$20$	$25$	$27$	$28$	$20$

Represent the above data by Pie chart.

MEDIUM

7th ICSE

IMPORTANT

New Mathematics Today Class 7>Chapter 24 - Graphical Representation of Data>Revision Exercise>Q 1

Make a bar graph of the data.

Wingspans of Birds
Birds	Wingspan
Seagull	$1.7 m$
Andean condor	$3.2 m$
Golden eagle	$2.5 m$
Grey heron	$1.7 m$
Gannet	$1.7 m$

EASY

7th ICSE

IMPORTANT

New Mathematics Today Class 7>Chapter 24 - Graphical Representation of Data>Revision Exercise>Q 2

Make a bar graph of the data.

School Days per year
Country	School Days
Belgium	$175$
Japan	$243$
Nigeria	$190$
South Korea	$225$
United States	$180$

MEDIUM

7th ICSE

IMPORTANT

New Mathematics Today Class 7>Chapter 24 - Graphical Representation of Data>Revision Exercise>Q 3

On a holiday, a man notes every hour how many litres of petrol are left in the tank of the car. The table lists his results.

Time	$10 : 00$	$11 : 00$	$12 : 00$	$13 : 00$	$14 : 00$	$15 : 00$	$16 : 00$	$17 : 00$
Number of litres	$30$	$25$	$17.5$	$12$	$40$	$40$	$32$	$25$

Choosing suitable scale, draw a line graph to show the information in the table. From your graph, find during which hour most petrol was used.

The number of students in a hostel speaking different languages is given below. Represent the data in a pie chart. Languages Hindi English Marathi Tamil Bengali Total Number of students 40 10 8 8 6 72

Important Questions on Graphical Representation of Data

Learn and Prepare for any exam you want !

The number of students in a hostel speaking different languages is given below. Represent the data in a pie chart.

Languages Hindi English Marathi Tamil Bengali Total

Number of students $40$ $10$ $8$ $8$ $6$ $72$