

4.3 Graphs of Polynomials
Presentation
•
Mathematics
•
9th - 12th Grade
•
Easy
Standards-aligned
William Torres
Used 2+ times
FREE Resource
17 Slides • 10 Questions
1
2
Draw
Bellwork:
Please complete the chart: (use your notes!)
3
Use the chart to complete your notes for Summary of Graphing Parent Functions.
Polynomials - Graphing
End Behavior
Notation
4
​
5
6
Multiple Choice
The end behavior of a polynomial function is determined by the DEGREE and the SIGN (+/-) of the Leading Coefficient (LC). Identify the DEGREE of the polynomial and the SIGN(+/-) of the LC
LC = +
Degree = Even
LC = +
Degree = Odd
LC = -
Degree = Even
LC = -
Degree = Odd
7
Multiple Choice
The end behavior of a polynomial function is determined by the DEGREE and the SIGN (+/-) of the Leading Coefficient (LC). Identify the DEGREE of the polynomial and the SIGN(+/-) of the LC
LC = +
Degree = Even
LC = +
Degree = Odd
LC = -
Degree = Even
LC = -
Degree = Odd
8
Multiple Choice
The end behavior of a polynomial function is determined by the DEGREE and the SIGN (+/-) of the Leading Coefficient (LC). Identify the DEGREE of the polynomial and the SIGN(+/-) of the LC
LC = +
Degree = Even
LC = +
Degree = Odd
LC = -
Degree = Even
LC = -
Degree = Odd
9
Multiple Choice
The end behavior of a polynomial function is determined by the DEGREE and the SIGN (+/-) of the Leading Coefficient (LC). Identify the DEGREE of the polynomial and the SIGN(+/-) of the LC
LC = +
Degree = Even
LC = +
Degree = Odd
LC = -
Degree = Even
LC = -
Degree = Odd
10
Factored form of a Polynomial
11
By taking a closer look at the factors we can determine the multiplicity of each factor and its corresponding root
Looking at the factors
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determines the behavior of the graph at the zeros.
Multiplicity
An even (2, 4, 6, 8, ...) multiplicity indicates that a zero is a turning point in the graph.
An odd (1, 3, 5, 7, ...) multiplicity indicates that the the graph will cross over the x-axis at the zero.
13
Keep track of your answers so you can provide them when needed

14
When in doubt... graph it!
15
What is the parity of the degree? (odd or even?)
What sign is the lead coefficient? (positive or negative?)
16
Multiple Choice
Given the function
f(x)=x3−4x2+3x−12 What is its end behavior?
Left, down; right, down
Left, up; right, up
Left, down; right, up
Left, up; right, down
17
What is its factored form?
Take time to work on it on your own first.
18
Multiple Choice
Given the function
f(x)=x3−4x2+3x−12 What is its factored form?
It cannot be factored
(x2−4)(x+3)
(x2−3)(x+4)
(x2+3)(x−4)
19
Pay close attention to exponents!
20
What are the zeros?
What is their multiplicity? (odd or even?)
Write it down on your paper first.
21
Multiple Choice
Given the function
f(x)=−x(x+2)(x−5)2 What are the zeros? What is their multiplicity?
0, even; -2, odd; 5, odd
-2, odd; 5, even
0, odd; -2, odd; 5, even
0, odd; -2, even; 5, odd
22
Where are the x-intercepts?
What is the behavior of the graph at each x-intercept?
23
Multiple Choice
Given the function
f(x)=−x(x+2)(x−5)2 Where are the x-intercepts? What is the behavior of the graph at each x-intercept?
(0,0); (-2,0); (5,0): Cross, bounce, cross
(0,0); (-2,0); (5,0): Bounce, bounce, cross
(0,0); (-2,0); (5,0): Cross, bounce, bounce
(0,0); (-2,0); (5,0): Cross, cross, bounce
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25
When in doubt... graph it!
26
27
Multiple Choice
Given the function
f(x)=−x(x+2)(x−5)2 How many relative extrema are there? What type?
Three: two relative minimums and one relative maximum
Three: two relative maximums and one relative minimum
Two: one relative maximum and one relative minimum
One: relative minimum
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