AnswersFL-1200330-Algebra 2 CRGraphing Polynomial Functions

Graphing Polynomial Functions Answers

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Complete the statements about the key features of the graph of f(x) = x5 – 9x3.As x goes to negative infinity, f(x) goes to infinity, and as x goes to positive

Answers:
Blank 1:negative
infinity, f(x) goes to:positive
2
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infinity, f(x) goes to infinity.

Answer:

positive

4

The graph of f(x) touches but does not cross✔ crossesneither crosses nor touches the x-axis at x = –3, 0, and 3.

A
touches but does not cross
B
✔ crosses
C
neither crosses nor touches
5

Choose all of the zeroes of f(x).

A
–3 with multiplicity 1
B
3 with multiplicity 1
C
0 with multiplicity 1
D
0 with multiplicity 3
E
3 with multiplicity 0
6

Check all the statement(s) that are true about the polynomial function graphed.

A
Its leading coefficient is positive.
B
Its leading coefficient is negative.
C
It has an odd degree.
D
It has an even degree.
E
It has exactly two real zeroes.
F
It has exactly three real zeroes.
G
None of the zeroes have even multiplicity.
H
None of the zeroes have odd multiplicity.
7

What is the end behavior of the graph of f(x) = x5 – 8x4 + 16x3?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
8

Question text not available

Answers:
Blank 1:4
Blank 2:0
9

Question text not available

Answers:
Blank 1:1
Blank 2:2
10

Question text not available

Answers:
If a zero is , then the graph of its function only touches the x–axis at that zero.:of even multiplicity
If a zero is , then the graph of its function crosses the x–axis at that zero.:of odd multiplicity
11

of odd multiplicity✔ of even multiplicity

Answers:
If a zero is , then the graph of its function only touches the x–axis at that zero.:of even multiplicity
If a zero is , then the graph of its function crosses the x–axis at that zero.:of odd multiplicity
12

The zeroes of the function are -2 and 00 and 4✔ -2, 0, and 4.

A
-2 and 0
B
0 and 4
C
✔ -2, 0, and 4
13

What intervals would you use to determine where the function is positive and negative?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
14

Which of the following could represent the graph of f(x) = x4 + x3 – 8x2 – 12x?

A
Option
Option A
B
Option
Option B
C
Option
Option C
15

Let a and b be real numbers, where Which of the following functions could represent the graph on the right?

Question illustration
A
f(x) = x (x – a)(x – b)2
B
f(x) = (x – a)(x – b)2
C
f(x) = x(x – a)³(x – b)
D
f(x) = x2(x – a) 2(x – b)2
16

Explain how to sketch a graph of the function f(x) = x3 + 2x2 – 8x. Be sure to include end-behavior, zeroes, and intervals where the function is positive and negative.

Answer:

Factor f(x) = x(x + 4)(x - 2). The zeroes are -4, 0, and 2, each with multiplicity 1, so the graph crosses the x-axis at each one. Since the function has odd degree and a positive leading coefficient, its left end falls toward negative infinity and its right end rises toward positive infinity. The function is negative on (-infinity, -4) and (0, 2), and positive on (-4, 0) and (2, infinity). Use these points and signs to draw a smooth cubic curve.

17

Did your explanation include the following?

A
The degree of the function is odd and the leading coefficient is positive – so the function goes to negative infinity as x goes to negative infinity and to positive infinity as x goes to positive infinity.
B
The zeroes are –4, 0, and 2, all with multiplicity 1.
C
The function is negative from negative infinity to –4 and from 0 to 2.
D
The function is positive from –4 to 0 and from 2 to infinity.
18

A polynomial function has a root of 0 with multiplicity 1, and a root of 2 with multiplicity 4. If the function has a negative leading coefficient, and is of odd degree, which of the following are true?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
19

Question text not available

Answer:

0

20

Question text not available

Answer:

2

21

✔ of odd multiplicityof even multiplicity

A
✔ of odd multiplicity
B
of even multiplicity

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