Page 538 - Basic College Mathematics with Early Integers

Vocabulary and Readiness Check

Fill in each blank with one of the choices below.

pictograph bar class frequency
histogram line class interval
1. A graph presents data using vertical or horizontal bars.
2. A is a graph in which pictures or symbols are used to visually present data.
3. A graph displays information with a line that connects data points.
4. A is a special bar graph in which the width of each bar represents a and the
height of each bar represents the .

FOR EXTRA HELP
7.1 Exercise Set

Objective The following pictograph shows the number of acres devoted to wheat production in selected states.
Use this graph to answer Exercises 1 through 8. See Examples 1 and 2. (Source: U.S. Department of Agriculture)

1. Which of the states shown plants the greatest quantity of Annual Wheat Acreage
acreage in wheat? in Selected Top States
2. Which of the states shown plant the least amount of wheat
North Dakota
acreage?
Kansas
3. Approximate the number of acres of wheat planted in
Oklahoma. Montana
4. Approximate the number of acres of wheat planted in South Dakota
Kansas. States Texas

5. Which state plants about 5,000,000 acres of Oklahoma
wheat?
Colorado
1 million acres
6. Which state plants about 4,000,000 acres of
Washington
wheat?
7. Which two states together plant about the same 8. Which two states together plant about the same
acreage of wheat as North Dakota? acreage of wheat as Texas?

The following pictograph shows the average number of wildfires in the United States between 2003 and 2009. Use this
graph to answer Exercises 9 through 16. See Examples 1 and 2. (Source: National Interagency Fire Center)
Wildfires in the United States
9. Approximate the number of wildfires in 2009.
2003
2004
10. Approximately how many wildfires were there in 2006?
2005
Years 2006
11. Which year, of the years shown, had the most wildfires?
2007
2008

12. In what years was the number of wildfires greater than
2009 12,000 fires
72,000?
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