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Intermediate Algebra – Student Workbook – Second Edition 2013

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

Practice Problems<br />

11. The table below shows how a Pizza freshly removed from the oven cools over time.<br />

Time (minutes) 0 5 9 12 15 18 22 25 30<br />

Temp ( º F) 199.5 184.7 178.1 159.2 141.7 124.6 115.4 104.5 99.3<br />

a) Use your calculator to determine the exponential regression equation that models the set<br />

of data above. Clearly indicate what each variable represents.<br />

b) Based on the equation found in part a, at what percent rate is the pizza cooling?<br />

c) Write and answer a “Read the Data” question (Extracting the data).<br />

d) Write and answer a “Read Between the Data” question (Interpolating the data).<br />

e) Write and answer a “Read Beyond the Data” question (Extrapolating the data).<br />

Scottsdale Community College Page 140 <strong>Intermediate</strong> <strong>Algebra</strong>

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