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Unit 4 Functions
Test Description: Review of Unit 4 Functions
Instructions: Answer all questions to get your test result.
1) Which coordinate is true in the expression y=5x+2 when x=6?
A
(6,32)
B
(6,3)
C
(13,6)
D
(3,6)
2) If f (x) = −4 x− 7, find... f (3)
A
-19
B
8
C
19
D
-8
3) If f (x) = −32x+ 1, find...f (0)
A
-32
B
1
C
0
D
-1
4) Given the function and a domain, find the range f (x) = −7x + 3, D=-12, -4, 3, 20
A
R=(-87, -31, 18, 137)
B
R=(87, 31, -18, -137)
C
R=(-87, -31, -18, -137)
D
R=(100, 131, -118, -37)
5) Give an example of a relation that is a function.
A
(–2, 5), (–1, 5), (0, 5), (1, 5), (-2, 5)
B
(–3, 5), (–2, 5), (–1, 5), (0, 5), (1, 5), (2, 5)
C
(–3, 5), (–2, 5), (0, 4), (0, 5), (1, 5), (2, 5)
D
(–3, 5), (–1, 5), (1, 6), (1, 5), (2, 5)
6) h(x) = 4 – 3x ...FInd h(-6) =
A
-22
B
22
C
-18
D
-14
7) f(x) = 2x + 5...Find f(-9)
A
18
B
20
C
23
D
-13
8) Give an example of a relation that is not a function.
A
(2, –3), (4, 6), (3, –1), (6, 6), (2, 3)
B
(2, –3), (4, 6), (3, –1), (6, 6), (1, 3)
C
(-2, –3), (4, 6), (3, –1), (6, 6), (2, 3)
D
(9, –3), (4, 6), (3, –1), (6, 6), (2, 3)
9) Given the function and a domain, find the range. f (x) = −6x − 1; D=-2, -1, 0, 5
A
R=11, 5, -2, -31
B
R=11, 5, -1, -31
C
R=10, 5, -1, -31
D
R=11, 6, -1, -31
10) How do you determine if a graph is a function?
A
Use the vertical line test. The function must only hit at one point.
B
Use the vertical line test. The function must only hit at two point.
C
Use the horizontal line test. The function must only hit at one point.
D
Use the horizontal line test. The function must only hit at one point.
11) How do you determine if a list of ordered pairs or a table is a function?
A
Look at the X values if they do repeat then you have a function
B
Look at the Y values if they do not repeat then you have a function
C
Look at the X values if they do not repeat then you have a function
D
Look at the Y values if they do not repeat then you have a function
12) Domain means...
A
nothing
B
Y values
C
X values
D
X and Y values
13) Range means...
A
X and Y values
B
X values
C
nothing
D
Y values
14) k(x) = -3x – 8 ...find k(5)
A
7
B
-8
C
-23
D
22
15) g(x) = x^2 – 4...find g(7)
A
53
B
49
C
45
D
50
*select an answer for all questions
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