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Intermediate Algebra – Student Workbook – Second Edition 2013

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Lesson 3a <strong>–</strong> Introduction to Exponential Functions<br />

Practice Problems<br />

10. In 2010, the estimated population of Maricopa County was 3,817,117. By 2011, the<br />

population had grown to 3,880,244.<br />

a) Assuming that the growth is linear, construct a linear equation that expresses the<br />

population, P, of Maricopa County x years since 2010.<br />

b) Assuming that the growth was exponential, construct an exponential equation that<br />

expresses the population, P, of Maricopa County x years since 2010.<br />

c) Use the equation found in part a to predict the population of Maricopa county in 2015.<br />

d) Use the equation found in part b to predict the population of Maricopa County in 2015.<br />

Scottsdale Community College Page 118 <strong>Intermediate</strong> <strong>Algebra</strong>

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