AIM: What is a circle graph?
Ability to customize a circle graph
independently based upon
scientific data
DEFINITION:
•a CIRCLE GRAPH is a diagram
which represents varying sections of
DATA
•The DATA VALUES are expressed as
a percentage
•diagramed as a circle.
Example: Who eats the Pizza at Mr. Z’s
• How many slice are in a pizza?
8
• What Percentage of the total is 4
slices
50%
• What percentage of the total is 2
slices
25%
• What percentage of the total is 1
slice?
12.5%
Example: Who eats the Pizza at Mr. Z’s
• Mr Z eats 4 slices. What percentage
of the total pie is that?
50%
• Mrs. Z eats 2 slices what percentage
of the total pies is that?
25%
• Alex eats one slice.
• Andie eats one slice.
12.5%
12.5%
Example: Who eats the Pizza
at Mr. Z’s
Andie 12.5%
Mr. Z 50%
Alex 12.5%
Mrs. Z 25%
Example: How much Pizza?
Jon has 4 slices, Bill has 3, Sue has 1
Person
Slice
%
4/8
50%
Jon
4
=
Bill
3
=
3/8
37.5%
Sue
1
=
1/8
12.5%
TOTAL 8
Example: How much Pizza?
Jon has 4 slices, Bill has 3, Sue has 1
Sue 12.5%
Jon 50%
Bill 37.5%
• Tips for Circle Graphs?
•Organize your data into a table
FIRST!
•Figure about how many total sections
of the “pie” there must be for your
graph
• Tips for Circle Graphs?
•Start at the center of the circle and draw
your lines outward to the circumference
•Try to label each piece of the wedge in the
wedge first. Draw a line if it does not fit
•Circle graphs need to have percentages!
•Don’t forget to Title your graph!
CLASS EXAMPLE
Suppose you watched TV all day.
You saw 35 toy commercials, 25 cereal
commercials, 25 fast food commercials,
and 15 commercials for other products
What do you do first?
•Step One: Put your Data in a Table
Number of Commercials
Type of Product
Number of Adds
Toys
35
Breakfast Food
25
Fast Food
25
Other products
15
•Step Two: Calculate the total number
of TV commercials in your study
•35 + 25 + 25 + 15 = 100 Total Units
•100 Total Commercials in all
categories
•Step Three: Calculate the percentage
of each section to the total number of
units
•Toys
35/100
35%
•Breakfast Foods 25/100
25%
•Fast Foods
25/100
25%
•Other
15/100
15%
Kinds of Adds on Children’s TV Shows
Fast Food
25%
Toys 35%
Breakfast
Food 25%
Other 15%
Knap-Sack Brand
Brand
Number of Boys
NIKE
20
FUBU
40
Polo
35
TARGET
15
Knap-Sack Brand
Brand
Number of Boys
NIKE
20
20/110 * 100=18%
FUBU
40
40/110 * 100 = 36%
Polo
35
35/110 * 100 = 32%
TARGET
15
15/110 * 100 = 14%
Knap-sack brand vs Students
10%
19%
Nike
Fubu
Polo
Target
33%
38%
A Team Population
Year
Number
2004
110
2003
105
2002
85
2001
101
A Team Population
Year
Number
2004
110
110/401 X 100 = 27.4%
2003
105
105/401 X 100 = 26.1%
2002
85
85/401 X 100 = 21.3%
2001
101
101/401 X 100 = 25.2%
Years vs. Number of Students
25%
28%
2004
2003
2002
2001
21%
26%
Sports Participation by Sex
Sport
Number of Boys Number of Girls
Soccer
25
20
Baseball
20
30
Basketball
15
15
Tennis
8
16
Sports Participation by Sex
Sport
Soccer
Number Number Total
Boys
Girls
45
25
20
Baseball
20
30
50
Basketball 15
15
30
Tennis
16
24
8
149
Sports Participation by Sex
Sport
Soccer
Number Number Total
Boys
Girls
45/149 * 100 = 30%
25
20
Baseball
20
30
50/149 * 100 = 34%
Basketball 15
15
30/149 * 100 = 20%
Tennis
16
24/149 * 100 = 16%
8
149
Total Sports Participation
tennis
16%
soccer
30%
basketball
20%
baseball
34%
NMS Fundrasing
Activity
Receipts Expense
Car wash
100
60
Breakfast
150
50
Bake Sale 125
25
Raffle
100
200
NMS Fundrasing
Activity
Receipts Expense Profit
Car wash
100
60
40
Breakfast
150
50
100
Bake Sale 125
25
Raffle
100
200
100
100
340
NMS Fundrasing
Activity
Receipts Expense Profit
Car wash
100
60
40/340 * 100 = 12%
Breakfast
150
50
100/340 * 100 = 29%
Bake Sale 125
25
Raffle
100
200
100/340 * 100 = 29%
100/340 * 100 = 30%
340
Profit from Each Event
Raffle
29%
Car Wash
12%
Pancake
30%
Bake Sale
29%
NMS Absences
Day
6th grade
7th
8th
Tuesday
5
10
6
Wednesday
7
10
6
Thursday
6
6
6
NMS Absences
Day
6th
7th
8th
Total
Tuesday
5
10
6
21
Wednesda 7
y
Thursday 6
10
6
23
6
6
18
62
NMS Absences
Day
6th
7th
8th
Total
Tuesday
5
10
6
21/62 * 100 = 34%
Wednesda 7
y
Thursday 6
10
6
23/62 * 100 = 37%
6
6
18/62 * 100 = 29%
62
Day vs Total Absences
0%
29%
34%
6th
7th
8th
37%
AIM: What is a Circle Graph?
Class ACTIVITY:
Middle School Circle Graph
page 70
(next page)
Homework:
INTERNET QUESTIONS