Intermediate Algebra – Student Workbook – Second Edition 2013

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

Lesson 1a – Introduction to Functions Practice Problems 11. The life expectancy for males in the United States can be modeled by the function L(x) = 0.27x + 48.3, where L is the life expectancy and x is the number of years since 1900. a) Which letter, L or x is used for input? b) What does the INPUT represent? Include units. c) Which letter, L or x, is used for output? d) What does the OUTPUT represent? Include units. e) Draw a neat, labeled and accurate sketch of this graph in the space below. X 0 20 40 60 80 100 120 L(x) f) What is the practical domain of L(x)? Use proper inequality notation. g) What is the practical range of L(x)? Use proper inequality notation. h) What is the life expectancy of a man born in Iowa in 1950? i) If a man is expected to live to the age of 60, approximate the year he was born. (Round to one decimal place)? Scottsdale Community College Page 24 Intermediate Algebra
Name: _____________________ Date: ________________ Lesson 1a Assessment 1. Let r(a) = 4 – 5a. Show all steps. Write each answer using function notation and as an ordered pair. a) Determine r(–2). b) For what value of a is r(a) = 19? 2. The graph of f(x) is given below. Use appropriate notation. a) Give the domain of f(x): _____________ b) Give the range of f(x): _______________ c) f (0) = _________ d) f (x) = 0 when x =_________________ 3. Consider the following table of values. Fill in the blanks below, and identify the corresponding ordered pairs. x -2 -1 0 1 2 3 4 g(x) 1 4 2 6 5 0 2 g(1) = _______, g(x) = 1 when x = ________, g(x) = 2 when x = _________________ Scottsdale Community College Page 25 Intermediate Algebra
Page 1 and 2: Scottsdale Community College Interm
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Appendix A: You Try Answers Lesson
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Intermediate Algebra – Student Workbook – Second Edition 2013

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