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Prealgebra for Two-Year Colleges/Workbook AIE/Circle and bar graphs

< Prealgebra for Two-Year Colleges‎ | Workbook AIE

Circle Graphs and Bar Graphs

WhyEdit

Circle graphs and bar graphs are often used rather than tables to display data. Graphs can give you a quick feeling for the data.

Learning ObjectivesEdit

  1. Construct clear, accurate circle graphs from tables.
  2. Construct clear, accurate bar graphs from tables.

ActivityEdit

1

What does it mean for a circle graph to be “clear”?

Construct a circle graph for the table below.
Leading U.S Passenger Airlines
Airline
# of Passengers
(in millions)
Delta
105
United
87
American
81
Southwest
59
U.S. Airways
58
Northwest
50

First Look on the last page of this handout. Cut out the protractor. You will use the protractor to measure angles in your circle graph.
Fill in the last column of the table (degrees):
Show your calculations in the table.

2

Delta?

3

United?

4

American?

5

Southwest?

6

U.S. Airways?

7

Northwest?

8

What is a reasonable place to round off to?

9

Why?

10

Name your graph.

Title:

11

Now draw the circle graph.

 
Construct a circle graph for the table below.
Where students live while attending college
 
Living Arrangement
# of students
Degrees
Parent’s or Guardian’s Home
320
(320 stu)/(700 stu) = N/(360°)
N ≈ a°
Campus Housing
180
(180 stu)/(700 stu) = N/(360°)
N ≈ b°
Off-Campus Rental
124
(124 stu)/(700 stu) = N/(360°)
N ≈ c°
Own Off-Campus Housing
62
(62 stu)/(700 stu) = N/(360°)
N ≈ d°
Other Arrangements
14
(14 stu)/(700 stu) = N/(360°)
N ≈ e°

12

What is the total number of students in the survey?

Use proportions to fill in the last column of the table (degrees). Show your proportions in the table. Round off to a reasonable place.

13

a?

14

b?

15

c?

16

d?

17

e?

18

Name your graph.

Title:

19

Now draw the circle graph.

 

20

What does it mean for a bar graph to be “clear”?

Create a vertical bar graph for the table to the right.
Leading U.S Passenger Airlines
Airline
# of Passengers
(in millions)
Delta
105
United
87
American
81
Southwest
59
U.S. Airways
58
Northwest
50

21

What is the smallest number?

22

What is the largest number?

23

What is the difference?

24

How many “tic marks” are there on the graph?

25

If you put the smallest number at the bottom, and the largest number at the top, how much would each tic mark be worth? Round to 0.001.

26

Round the answer in previous question up to a “nice” number.

27

What does a “zig-zag” on the axis mean?

28

Will you use one?

yes
no

29

Why?

30

Make the bar graph.