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HRW Alg 2 Lesson 5.2.notes.notebook 1 October 13, 2015 Aug 304:50 PM Unit 3, Module 5 5.2 Graphing Polynomial Functions

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Page 1: 5.2 Graphing Polynomial Functionsmrdealy.weebly.com/uploads/2/3/5/2/23520438/hrw_alg_2_lesson_5.2.notes.pdfHRW Alg 2 Lesson 5.2.notes.notebook 1 October 13, 2015 Aug 304:50 PM Unit

HRW Alg 2 Lesson 5.2.notes.notebook

1

October 13, 2015

Aug 30­4:50 PM

Unit 3, Module 5

5.2 Graphing Polynomial Functions

Page 2: 5.2 Graphing Polynomial Functionsmrdealy.weebly.com/uploads/2/3/5/2/23520438/hrw_alg_2_lesson_5.2.notes.pdfHRW Alg 2 Lesson 5.2.notes.notebook 1 October 13, 2015 Aug 304:50 PM Unit

HRW Alg 2 Lesson 5.2.notes.notebook

2

October 13, 2015

Apr 24­12:47 PM

End Behavior

1.  n is even and a > 0,

2.  n is even and a < 0,

3.  n is odd and a > 0,

4.  n is odd and a < 0,

Let n = highest exponentLet a = leading coefficient

Describe the end behavior

f(x) = x3 ‐ 2x2 ‐ 5x + 3

f(x) = 1 + x ‐ x2 ‐ x3 + 2x4

Page 3: 5.2 Graphing Polynomial Functionsmrdealy.weebly.com/uploads/2/3/5/2/23520438/hrw_alg_2_lesson_5.2.notes.pdfHRW Alg 2 Lesson 5.2.notes.notebook 1 October 13, 2015 Aug 304:50 PM Unit

HRW Alg 2 Lesson 5.2.notes.notebook

3

October 13, 2015

Oct 9­9:13 PM

Identify whether the function graphed has an odd or even degree and a positive or negative leading coefficient.

Page 4: 5.2 Graphing Polynomial Functionsmrdealy.weebly.com/uploads/2/3/5/2/23520438/hrw_alg_2_lesson_5.2.notes.pdfHRW Alg 2 Lesson 5.2.notes.notebook 1 October 13, 2015 Aug 304:50 PM Unit

HRW Alg 2 Lesson 5.2.notes.notebook

4

October 13, 2015

Apr 15­8:59 AM

Graphs of Polynomials

Relative Extrema:  relative (local) max/min

x‐intercepts: Also known as roots and zeros

Page 5: 5.2 Graphing Polynomial Functionsmrdealy.weebly.com/uploads/2/3/5/2/23520438/hrw_alg_2_lesson_5.2.notes.pdfHRW Alg 2 Lesson 5.2.notes.notebook 1 October 13, 2015 Aug 304:50 PM Unit

HRW Alg 2 Lesson 5.2.notes.notebook

5

October 13, 2015

Oct 9­9:39 PM

Find the number of turning points for each function. Then find the roots (x‐intercepts).

ex. ex.

Page 6: 5.2 Graphing Polynomial Functionsmrdealy.weebly.com/uploads/2/3/5/2/23520438/hrw_alg_2_lesson_5.2.notes.pdfHRW Alg 2 Lesson 5.2.notes.notebook 1 October 13, 2015 Aug 304:50 PM Unit

HRW Alg 2 Lesson 5.2.notes.notebook

6

October 13, 2015

Oct 9­9:13 PM

Write the function in factored form for each graph.

Sketching Graphs

f(x) = x(x ‐ 1)(x + 4)

x‐int: turning pts: end behavior:

Sign Chartconstant x x ‐ 1 x + 4 f(x)

Page 7: 5.2 Graphing Polynomial Functionsmrdealy.weebly.com/uploads/2/3/5/2/23520438/hrw_alg_2_lesson_5.2.notes.pdfHRW Alg 2 Lesson 5.2.notes.notebook 1 October 13, 2015 Aug 304:50 PM Unit

HRW Alg 2 Lesson 5.2.notes.notebook

7

October 13, 2015

Sketching Graphs

f(x) = ‐(x ‐ 4)(x ‐ 1)(x + 1)(x + 2)

x‐int: turning pts: end behavior:

Sign Chart

Sketching Graphs

f(x) = 2(x ‐ 3)2(x + 1)

x‐int: turning pts: end behavior:

Sign Chart

Page 8: 5.2 Graphing Polynomial Functionsmrdealy.weebly.com/uploads/2/3/5/2/23520438/hrw_alg_2_lesson_5.2.notes.pdfHRW Alg 2 Lesson 5.2.notes.notebook 1 October 13, 2015 Aug 304:50 PM Unit

HRW Alg 2 Lesson 5.2.notes.notebook

8

October 13, 2015

Oct 9­10:01 PM

HW 5.2 #3‐7, 9‐11, 14‐20

*local min/max only

use end behavior, intercepts, sign chart