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Alg2 4.7 and 4.8 Notes.notebook November 19, 2012
Skills we need
47/48 Transformations & Regressions
How does each function compare to its parent function?1. f(x) = 2(x – 3)2 – 4 2. g(x) = (–x)3 + 1
x 1 2 6 11 13f(x) 3 6 39 120 170
Perform a quadratic regression on the following data:
Monday plan: Learn 4.7/4.8, Answer 4.6 Q's, give back quizzes
Warmup Answers
x 1 2 6 11 13f(x) 3 6 39 120 170
Perform a quadratic regression on the following data:
Alg2 4.7 and 4.8 Notes.notebook November 19, 2012
47/48 Transformations & Regressions
Transforming exponential and logarithmic functionsDescribing the effects of change to parent graphs
Write exponential and logarithm models for dataUse those models to predict and analyze
Modeling
I. Transformations
Alg2 4.7 and 4.8 Notes.notebook November 19, 2012
II. Writing Transformations
Write each transformed function.
f(x) = 4x is reflected across both axes and moved 2 units down.
g(x)= –(4–x) – 2
f(x) = log x is translated 3 units left and stretched vertically by a factor of 2.
g(x) = 2 log(x + 3)
I. Exponential DataDetermine whether f is an exponential function of x of the form f(x) = abx. If so, find the constant ratio.
ratio = 3
Use exponential regression to find a function that models this data.
Step 1. Enter dataStep 2. Graph dataStep 3. Calculate regression equation
Alg2 4.7 and 4.8 Notes.notebook November 19, 2012
Use exponential regression to find a function that models this data. When will the number of bacteria reach 2000?
x1.24 x1.26 x1.25 x1.25x1.25
x1.07x1.02x1.01x1.01
x1.01
Alg2 4.7 and 4.8 Notes.notebook November 19, 2012
Find the best model for the given data
When calculating an exponential or logarithmic regression, make sure you eliminate data points that violate domain restrictions.
Alg2 4.7 and 4.8 Notes.notebook November 19, 2012
47 p.285 #1, 3, 7, 8, 11, 14, 15, 28, 32, 33 42, 45 47
*22 problems SA16SA17
48 p.292 #2, 3, 6, 7, 13, 14, 26 28, 31*10 problems SA17
Group Quiz Wednesday on 4.1 4.8!! 4 story problems 6 solving equations 1 killer bonus
Online Extra Credit Due Nov 28, 9 AM