A driver’s age has something to do with his or her chance of getting into a fatal car cras...

A driver’s age has something to do with his or her chance of getting into a fatal car crash. The bar graph shows the number of fatal vehicle crashes per 100 million miles driven for drivers of various age groups. For example, 25-year-old drivers are involved in 4.1 fatal crashes per 100 million miles driven. Thus, when a group of 25-year-old Americans have driven a total of 100 million miles, approximately 4 have been in accidents in which someone died.

Age of U.S. Drivers and Fatal Crashes

Source: Insurance Institute for Highway Safety

The number of fatal vehicle crashes per 100 million miles, y, for drivers of age x can be modeled by the formula

Use the formula above to solve.

What age groups are expected to be involved in 10 fatal crashes per 100 million miles driven? How well does the formula model the trend in the actual data shown by the bar graph?

By the end of 2010, women made up more than half of the labor force in the United States for the first time in the country’s history. The graphs show the percentage of jobs in the U.S. labor force held by men and by women from 1972 through 2009. Exercises 143-144 are based on the data displayed by the graphs.

Percentage of U.S. Jobs Held by Men and Women

Source: Bureau of Labor Statistics