Intermediate Algebra – Student Workbook – Second Edition 2013

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$Lesson 2a – Assessment - Scottsdale Community College - Math Blog$

Lesson 2a – Linear Functions and Applications Mini-Lesson Problem 1 YOU TRY – REVIEW OF LINEAR FUNCTIONS The function E(t) = 3861 – 77.2t gives the surface elevation (in feet above sea level) of Lake Powell t years after 1999. a) Identify the vertical intercept of this linear function and write a sentence explaining its meaning in this situation. b) Determine the surface elevation of Lake Powell in the year 2001. Show your work, and write your answer in a complete sentence. c) Determine E(4), and write a sentence explaining the meaning of your answer. d) Is the surface elevation of Lake Powell increasing or decreasing? How do you know? e) This function accurately models the surface elevation of Lake Powell from 1999 to 2005. Determine the practical range of this linear function. Scottsdale Community College Page 54 Intermediate Algebra
Lesson 2a – Linear Functions and Applications Mini-Lesson Average rate of change (often just referred to as the “rate of change”) of a function over a change in output change in y specified interval is the ratio = change in input change in x . output units Units for the Average Rate of Change are always input units . Problem 2 MEDIA EXAMPLE – AVERAGE RATE OF CHANGE The function E(t) = 3861 – 77.2t gives the surface elevation (in feet above sea level) of Lake Powell t years after 1999. Use this function and your graphing calculator to complete the table below. E(t), Surface Elevation of Lake Powell t, years since 1999 (in feet above sea level) 0 1 2 3 5 6 a) Determine the Average Rate of Change of the surface elevation between 1999 and 2000. b) Determine the Average Rate of Change of the surface elevation between 2000 and 2004. c) Determine the Average Rate of Change of the surface elevation between 2001 and 2005. Scottsdale Community College Page 55 Intermediate Algebra
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Scottsdale Community College Interm
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Table of Contents Lesson 1a - Intro
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Lesson 1a - Introduction to Functio
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Lesson 6a - Exponents and Rational
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Lesson 6b - Rational Exponents & Ra
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Lesson 6b - Rational Exponents and
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Appendix A: You Try Answers Lesson
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Appendix A: You Try Answers You Try
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Intermediate Algebra – Student Workbook – Second Edition 2013

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