Page 547 - Basic College Mathematics with Early Integers

524 C HAPTE R 7 I STATISTICS AND PROBABILITY

It makes no difference which sector we draw first. To construct the “Army”
sector, we find 137° on the protractor and mark our circle. Then we remove the
protractor and use this mark to draw a second line from the center to the circle
itself.

137
Army
38%

To construct the “Navy” sector, we follow the same procedure as above, except
that we line up 0° with the second line we drew and mark the protractor at 83°.

Army Army
38% 38%
Navy
23%

83

We continue in this manner until the circle graph is complete.

Army
38%
Coast Guard
3% Navy
23%
Air Force
22%

Marine Corps 14%

Work Practice 4

Concept Check True or false? The larger a sector in a circle graph, the
larger the percent of the total it represents. Explain your answer.

Copyright 2012 Pearson Education, Inc.

Concept Check Answer
true