AnswersKISD SS-3350B-Algebra I B-CRUnit Test

Quadratic Functions: Factored Form Answers

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1
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The function f(x) = (x − 4)(x − 2) is shown.

Question illustration
A
all real numbers less than or equal to 3
B
all real numbers less than or equal to −1
C
all real numbers greater than or equal to 3
D
all real numbers greater than or equal to −1
2
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The graph of the function f(x) = (x +2)(x + 6) is shown below.

Question illustration
A
The domain is all real numbers, and the range is all real numbers greater than or equal to –4.
B
The domain is all real numbers greater than or equal to –4, and the range is all real numbers.
C
The domain is all real numbers such that –6 ≤ x ≤ –2, and the range is all real numbers greater than or equal to –4.
D
The domain is all real numbers greater than or equal to –4, and the range is all real numbers such that –6 ≤ x ≤ –2.
3

Which is the graph of f(x) = –(x + 3)(x + 1)?

A
Option
B
Option
C
Option
D
Option
4

The graph of the function f(x) = (x − 3)(x + 1) is shown.

Question illustration
A
all real values of x where x < −1
B
all real values of x where x < 1
C
all real values of x where 1 < x < 3
D
all real values of x where x > 3
5

The graph of the function f(x) = (x + 2)(x + 6) is shown below.

Question illustration
A
The function is positive for all real values of x wherex > –4.
B
The function is negative for all real values of x where–6 < x < –2.
C
The function is positive for all real values of x wherex –3.
D
The function is negative for all real values of x wherex < –2.
6

Which function has two x-intercepts, one at (0, 0) and one at (4, 0)?

A
f(x) = x(x − 4)
B
f(x) = x(x + 4)
C
f(x) = (x − 4)(x − 4)
D
f(x) = (x + 4)(x + 4)
7

Which function has a vertex at the origin?

A
f(x) = (x + 4)2
B
f(x) = x(x – 4)
C
f(x) = (x – 4)(x + 4)
D
f(x) = –x2
8

Which is the graph of f(x) = (x – 1)(x + 4)?

A
Option
B
Option
C
Option
D
Option
9

What is the y-intercept of the quadratic functionf(x) = (x – 8)(x + 3)?

A
(8,0)
B
(0,3)
C
(0,–24)
D
(–5,0)
10

What is the midpoint of the x-intercepts off(x) = (x – 2)(x – 4)?

A
(–3,0)
B
(–1,0)
C
(1,0)
D
(3,0)

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