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Intermediate Algebra – Student Workbook – Second Edition 2013

Intermediate Algebra – Student Workbook – Second Edition 2013

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Lesson 3b <strong>–</strong> More Exponential Functions<br />

Practice Problems<br />

8. On April 1, 2000 (Census day), the population of Scottsdale, AZ was 202,625. On April 1,<br />

2010, the population of Scottsdale, AZ was 217,385.<br />

a) Use this information and your graphing calculator to determine an exponential regression<br />

equation that expresses the population, P, of Scottsdale, AZ x years since 2000.<br />

b) Use the equation found in part a to predict the population of Scottsdale, AZ on<br />

April 1, <strong>2013</strong>. Show all work, and write your answer in a complete sentence.<br />

Round your answer to the nearest whole number.<br />

c) Use the equation found in part a to predict the year in which the population of<br />

Scottsdale AZ will reach 500,000. Show all work, and write your answer in a<br />

complete sentence.<br />

d) Based on the equation found in part a, at what percent rate is Scottsdale’s population<br />

increasing each year?<br />

Scottsdale Community College Page 137 <strong>Intermediate</strong> <strong>Algebra</strong>

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