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1.1 Integers and Rational Numbers

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www.ck12.org Chapter 8. Graphs <strong>and</strong> Graphing Linear EquationsPractice Set1. The students at a local high school took The Youth Risk Behavior Survey. The graph below shows the percentageof high school students who reported that they were current smokers. A person qualifies as a current smoker ifhe/she has smoked one or more cigarettes in the past 30 days. What percentage of high-school students were currentsmokers in the following years?1. 19912. 19963. 20044. 20052. The graph below shows the average life-span of people based on the year in which they were born. Thisinformation comes from the National Vital Statistics Report from the Center for Disease Control. What is theaverage life-span of a person born in the following years?1. 19402. 19553. 19804. 1995145

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