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PIE CHARTMiss Nora

By PresenterMedia.com
http://www.presentermedia.com/mspp.htmlhttp://www.presentermedia.com/mspp.html

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STEPS:

Find the total

Calculate the percentages

Construct the pie chart

Step 1

Step 2

Step 3

Step 4

Calculate the degrees

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Comedy Action Romance Drama SciFi

4 5 6 1 4

Example:

Below is a survey of your friends on which kind of movies the likedbest, the results are below:

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Find the total

Step 1:

comedy action romance drama SciFi Total

4 5 6 1 4 20

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Step 2:Find the percentage

Comedy Action Romance Drama SciFi Total

4 5 6 1 4 20

4/20 x 100

= 20%

5/20 x 100

= 25%

6/20 x 100

= 30%

1/20 x 100

= 5%

4/20 x 100

= 20%100%

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Step 3:Find the degree

Comedy Action Romance Drama SciFi Total

4 5 6 1 4 20

4/20 x 100

= 20%

5/20 x 100

= 25%

6/20 x 100

= 30%

1/20 x 100

= 5%

4/20 x 100

= 20%100%

4/20 x 360

= 72

5/20 x 360

= 90

6/20 x 360

= 108

1/20 x 360

= 18

4/20 x 360

= 72360

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Step 4Construct the pie chart (use your protractor)

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Students in Technical college

departments

ScienceEngineering

Mathematics

Computing

example

The number of students inthe four departments of atechnical College arerepresented in the pie chart.There are 150 students in themathematics department.Calculate:

a) The total number ofstudents in the college

b) The number of studentsin the Engineeringdepartment

c) The percentage ofstudents in theComputing department

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Solutionsa)(150 x) x 360 = 90

(150 x = 90 360 = 0.25

x = 150 0.25

x = 600

b) (x 600) x 360 = 120

x 600 = 120 360 = 1/3x = (1/3) x 600 = 200

c) (54 360) x 100

= 15%

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ACTIVITYHOUR(S)SPENT

ON ACTIVITY

PERCENT OFDAY

DEGREE OFCIRCLE

School 8

Break time 2

Doinghomework

2

Resting 4

sleeping 8

Complete the table to show how Nina spends her time in a day(24 HOURS). Use a protractor to create a circle graph / pie

chart of the above information. Be sure to include a title.

QUESTION 1:

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Type of Programme FrequencySoaps 8

Films 9

News 1

Quizzes 2Nature Programmes 4

Others 6

A survey was conducted on what types of television

programme people preferred. 30 people wereinterviewed and the results of the survey were as

follows. Construct a pie chart.

QUESTION 2:

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Main Course FrequencyAngle of

frequency

Roast 15

Salad 10

Vegetarian 9

Curry 6

Fish 12

Rolls 8

Total 360

Table 1:The main courses chosen by pupils in Year 9

QUESTION 3:

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Paper Frequency Angle of frequency

Daily Mail 6

The Sun 24

Telegraph 18

The Mirror 20

The Times 4

Total 360

Table 2:The papers bought by Pupils were:

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Item Cost Percentages

School Dinners 2.50

Clothes 6.00

Books and Magazines 3.00

Tuck Shop 2.00

Saved 4.50

Total 100

Table 3:Last week Anna spent her money on:

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1. Complete Table 1 to 3

2. Construct pie chart for Table 1 to 3

3. In Table 1, how many degrees represent 1 pupil?

4. In Table 2, which paper gets 25% of the sales? Hint; 25% is thesame as a quarter.

5. In Table 3, what was Annas total amount of spending money?Which two items did Anna spend half of her money on?

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BAR GRAPH EXERCISES:

For every question (4 QUESTIONS) on pie

chart / circle graphs, construct BARCHARTS (please write the title of each bar

graphs)

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Years Wheat Barley Oats

1991 34 18 27

1992 43 14 24

1993 43 16 27

1994 45 13 34

Example:

The table below shows the quantity in hundred kgs of

Wheat, Barley and Oat produced on a certain formduring the years 1991 to 1994. Construct a component

bar chart to illustrate this data

COMPONENT BAR CHARTS

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0

5

10

15

20

25

30

35

40

45

50

1991 1992 1993 1994

Wheat

Barley

Oats

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1. The output of an electrical company (in thousands) is as follows. Illustrate this

information with an appropriate chart (a component bar chart!).

2. Draw a component bar chart to illustrate the table below

Personal

stereos

TV sets Video

recorders

Hi-fis

1995 23.4 18.6 7.3 2.7

1996 25.2 18.6 8.5 18.5

1997 19.7 20.5 9.4 20.6

USA Russia Germany China UK

Gold 15 8 6 12 3

Silver 23 17 0 10 2

Bronze 14 18 5 0 6

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LINE GRAPHA line graph is used to display data that show how one variable (the responding

variable) changes in response to another variable (the manipulated variable).

Number of Croaks vs. Temperature

Air Temperature (celcius) Frog Croaks (per minute)

22 12

23 14

24 15

26 16

28 17

31 21

32 26

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Tips for Creating Line Graphs

1. On graph paper, draw a horizontal, orx-, axis and a vertical, or y-, axis.

2. Label the horizontal axis with the name of the manipulated variable. Label the vertical

axis with the name of the responding variable. Include the units of measure.3. Create a scale on each axis by marking off equally-spaced numbers along the axis. Begin

with zero or a number slightly less than the smallest number to be graphed. Be sure that

each scale covers the entire range of data collected for that variable. Label the units on

each scale.

4. Plot each point where the variables intersect. You can do this by following an imaginary

line up from the measurement on the x-axis. Then follow a second imaginary line acrossfrom the corresponding measurement on the y-axis. Place a dot where the two lines

intersect.

5 Consider whether you will plot from point to point or make a best fit graph. Ifyou plot

from point to point, each segment connecting two adjacent points should be straight. If you

make a best fit graph, the connecting line should be smooth.

6. Give your graph a title that identify the variables or the relationship between thevariables in the graph. On the next slide, Number of Frog Croaks at Different

Temperatures is a complete title that clearly describes this graph.

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Use a sheet of graph paper to make a graph of the data given below. Thenanswer the questions.

Time (min) Temperature (Celcius) Solid, Liquid or Gas

0 -20 Solid

5 0 Solid (melting)

10 0 Solid (melting)

15 52 Liquid

20 100 Liquid (boiling)











75 110 Gas

80 120 Gas

1. On a sheet

of graph

paper, make aline graph of

the data the

group

collected.

2. What does

the graph tellyou about the

temperature

of the

substance at

different

times duringthe

investigation?

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Activity
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pie chart (26.3)

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