Intermediate Algebra – Student Workbook – Second Edition 2013

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

Lesson 4b – More on Logarithms Practice Problems 8. Modeling Data with Logarithmic Regression Just as we did with Linear and Exponential Functions, we can model appropriate data using regression. The steps are very similar to the other processes we have used. Determine if the data set below can be modeled by a logarithmic function. If so, find that function rounding all decimals to 4 places. x .5 1 2 3 4 5 y -27 2 32 50 61 70 Step 1: Insert data into L1, L2 list using Stat>Edit. Step 2: Turn on your Plot (Go to Y= and highlight Plot 1) then select Zoom9 to work with a good window for your data. Draw your graph on the right. Step 3: Go to Stat>Calc>9:LnReg to find the Logarithmic Regression model for the data. Step 4: Press Enter twice to form the equation information on your screen. Using the formula Write the equation using Y = a + bLnX Step 5: Enter the equation into your Y= list and press Graph to show the graph of the data and the model. Draw the graph. Scottsdale Community College Page 178 Intermediate Algebra
Lesson 4b – More on Logarithms Practice Problems 9. Linear, Exponential or Logarithmic? For each of the following sets of data, determine if it is best modeled with a Linear, Exponential or Logarithmic Equation. a) Enter the data into your calculator. b) Create a Scatter Plot for the data c) Decide which Regression to use, Linear, Exponential or Logarithmic d) Write the final equation. e) Enter the equation into your calculator f) Graph the results with labels (On graph paper). Include both the Scatter Plot and the Graph g) For each of the sets of data, write and solve a “Read Between the Data (Interpolating the Data)” or a “Read Beyond the Data (Extrapolating the Data)” Question. Age of Tree (Years) 1 2 3 4 5 6 7 8 9 Height (Feet) 6 9.5 13 15 16.5 17.5 18.5 19 19.5 Scottsdale Community College Page 179 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 1b - Linear Equations In the
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Lesson 1b - Linear Equations Mini-L
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Lesson 3b - More Exponential Functi
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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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