AnswersFL-1200330-Algebra 2 CRGraphing Polynomial Functions

Graphing Polynomial Functions Answers

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A polynomial function has a root of –5 with multiplicity 3, a root of 1 with multiplicity 2, and a root of 3 with multiplicity 7. If the function has a negative leading coefficient and is of even degree, which statement about the graph is true?

A
The graph of the function is positive on (, –5).
Option A
B
The graph of the function is negative on (–5, 3).
C
The graph of the function is positive on (, 1).
Option C
D
The graph of the function is negative on (3, ).
Option D
2
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At which root does the graph of f(x) = (x + 4)6(x + 7)5 cross the x-axis?

A
–7
B
–4
C
4
D
7
3

What is the end behavior of the graph of the polynomial function f(x) = 3x6 + 30x5 + 75x4?

A
As , and as , .
Option A
B
As , and as , .
Option B
C
As , and as , .
Option C
D
As , and as , .
Option D
4

Which graph shows the same end behavior as the graph of f(x) = 2x6 – 2x2 – 5?

A
mc003-1.jpg
Option A
B
mc003-2.jpg
Option B
C
mc003-3.jpg
Option C
D
mc003-4.jpg
Option D
5

What is the end behavior of the graph of the polynomial function f(x) = 2x3 – 26x – 24?

A
As , and as , .
Option A
B
As , and as , .
Option B
C
As , and as , .
Option C
D
As , and as , .
Option D
6

Let a and b be real numbers where a b 0. Which of the following functions could represent the graph below?

Question illustration
A
f(x) = x(x – a)3(x – b)3
B
f(x) = (x – a)2(x – b)4
C
f(x) = x(x – a)6(x – b)2
D
f(x) = (x – a)5(x – b)
7

Which statement describes the graph of f(x) = –x4 + 3x3 + 10x2?

A
The graph crosses the x-axis at x = 0 and touches the x-axis at x = 5 and x = –2.
B
The graph touches the x-axis at x = 0 and crosses the x-axis at x = 5 and x = –2.
C
The graph crosses the x-axis at x = 0 and touches the x-axis at x = –5 and x = 2.
D
The graph touches the x-axis at x = 0 and crosses the x-axis at x = –5 and x = 2.
8

Which of the following graphs could be the graph of the function f(x) = x4 + x3 – x2 – x?

A
mc020-1.jpg
Option A
B
mc020-2.jpg
Option B
C
mc020-3.jpg
Option C
D
mc020-4.jpg
Option D
9

Which of the following describes the zeroes of the graph of f(x) = 3x6 + 30x5 + 75x4?

A
–5 with multiplicity 2 and with multiplicity 4
Option A
B
5 with multiplicity 2 and with multiplicity 4
Option B
C
–5 with multiplicity 2 and 0 with multiplicity 4
D
5 with multiplicity 2 and 0 with multiplicity 4
10

Which statement describes the graph of f(x) = 4x7 + 40x6 + 100x5?

A
The graph crosses the x-axis at x = 0 and touches the x-axis at x = 5.
B
The graph touches the x-axis at x = 0 and crosses the x-axis at x = 5.
C
The graph crosses the x-axis at x = 0 and touches the x-axis at x = –5.
D
The graph touches the x-axis at x = 0 and crosses the x-axis at x = –5.

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