Page 548 - Basic College Mathematics with Early Integers

Vocabulary and Readiness Check

Use the choices below to fill in each blank.

sector circle 100 360
1. In a graph, each section (shaped like a piece of pie) shows a category and the relative size of the category.
2. A circle graph contains pie-shaped sections, each called a .
3. The number of degrees in a whole circle is .
4. If a circle graph has percent labels, the percents should add up to .

7.2 Exercise Set FOR EXTRA HELP

Objective The following circle graph is a result of surveying 700 college students.They were asked where they live while
attending college. Use this graph to answer Exercises 1 through 6.Write all ratios as fractions in simplest form. See Example 1.

1. Where do most of these college students live? Campus
housing
180
2. Besides the category “Other arrangements,” where Parent or
do the fewest of these college students live? guardian’s
Other home
arrangements 320
3. Find the ratio of students living in campus housing to 14
total students. Own
off-campus
housing
62
4. Find the ratio of students living in off-campus rentals Off-campus
to total students. rental
124

5. Find the ratio of students living in campus housing to 6. Find the ratio of students living in off-campus rentals
students living in a parent or guardian’s home. to students living in a parent or guardian’s home.

The following circle graph shows the percent of the land area of the continents of Earth. Use this graph for Exercises 7
through 14. See Example 2.

7. Which continent is the largest? North America
16%
Asia
Australia 30%
8. Which continent is the smallest? 5%
Europe
7%
9. What percent of the land on Earth is accounted for
by Asia and Europe together? Antarctica
9%
South America Africa
10. What percent of the land on Earth is accounted for 12% 21%
by North and South America? Source: National Geographic Society

The total amount of land from the continents is approximately 57,000,000 square miles. Use the graph to find the area of
the continents given in Exercises 11 through 14. See Example 3.

11. Asia 12. South America 13. Australia 14. Europe

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