Question 1

Find the indicated function value.
- xf(x) −30−110015120330 Find f(−1) \begin{array}{l}\begin{array} { c | c } x & f ( x )  \\hline - 3 & 0 \- 1 & 10 \0 & 15 \1 & 20 \3 & 30\end{array}\	ext { Find } f ( - 1 ) \end{array}x−3−1013​f(x) 010152030​​ Find f(−1) ​

Accepted Answer

A)   20
B)   30
C)   10
D)   0

Question 2

Use the vertical line test to determine whether or not the graph is a graph of a function.
-

Accepted Answer

A)   function
B)   not a function

Question 3

Find the indicated function value.
- f(x) =x+3,g(x) =x−4f ( x )  = x + 3 , g ( x )  = x - 4f(x) =x+3,g(x) =x−4 
Find  (f+g) (−5) ( f + g )  ( - 5 ) (f+g) (−5)  .

Accepted Answer

A)    −3- 3−3 
B)    −11- 11−11 
C)    −17- 17−17 
D)    −9- 9−9

Question 4

The graph below shows the percentage of students enrolled in the College of Engineering at State University. Use the graph to
answer the question. 
-If f(x)  = 15%, what year is represented by x?

Accepted Answer

A)   1985
B)   1990
C)   1980
D)   1995

Question 5

Use the vertical line test to determine whether or not the graph is a graph of a function.
-

Accepted Answer

A)   function
B)   not a function

Question 6

Use the graph to find the indicated function value.
-y = f(x) . Find f(-4)

Accepted Answer

A)   4
B)   13
C)   1.75
D)   -4

Question 7

Find the domain and range.
- {(−4,13) ,(−3,6) ,(0,−3) ,(3,6) ,(5,22) }\{ ( - 4,13 )  , ( - 3,6 )  , ( 0 , - 3 )  , ( 3,6 )  , ( 5,22 )  \}{(−4,13) ,(−3,6) ,(0,−3) ,(3,6) ,(5,22) }

Accepted Answer

A)   domain:  {13,6,−3,22}\{ 13,6 , - 3,22 \}{13,6,−3,22} ; range:  {−4,−3,3,5}\{ - 4 , - 3,3,5 \}{−4,−3,3,5} 
B)   domain:  {13,6,−3,22}\{ 13,6 , - 3,22 \}{13,6,−3,22} ; range:  {−4,−3,0,3,5}\{ - 4 , - 3,0,3,5 \}{−4,−3,0,3,5} 
C)   domain:  {−4,−3,0,3,5}\{ - 4 , - 3,0,3,5 \}{−4,−3,0,3,5} ; range:  {13,6,−3,22}\{ 13,6 , - 3,22 \}{13,6,−3,22} 
D)   domain:  {−4,−3,3,5}\{ - 4 , - 3,3,5 \}{−4,−3,3,5} ; range:  {13,6,−3,22}\{ 13,6 , - 3,22 \}{13,6,−3,22}

Question 8

Find the domain of the function.
- f(x) =x2+1f ( x )  = x ^ { 2 } + 1f(x) =x2+1

Accepted Answer

A)    (∞,∞) ( \infty , \infty ) (∞,∞)  
B)    (∞,−1) ( \infty , - 1 ) (∞,−1)   or  (−1,∞) ( - 1 , \infty ) (−1,∞)  
C)    [−1,∞) [ - 1 , \infty ) [−1,∞)  
D)    (−1,∞) ( - 1 , \infty ) (−1,∞)

Question 9

Find the indicated function value.
-  Find f(−2)  when f(x) =5x2+4x+1	ext { Find } f ( - 2 )  	ext { when } f ( x )  = 5 x ^ { 2 } + 4 x + 1 Find f(−2)  when f(x) =5x2+4x+1

Accepted Answer

A)   -3
B)   13
C)   11
D)   29

Question 10

Decide whether the relation is a function.
- {(−6,5) ,(−6,−7) ,(1,2) ,(6,6) ,(9,8) }\{ ( - 6,5 )  , ( - 6 , - 7 )  , ( 1,2 )  , ( 6,6 )  , ( 9,8 )  \}{(−6,5) ,(−6,−7) ,(1,2) ,(6,6) ,(9,8) }

Accepted Answer

A)   not a function
B)   function

Exam 8: Basics of Functions

Find the indicated function value. - $\text { Find } f ( - 2 ) \text { when } f ( x ) = 5 x ^ { 2 } + 4 x + 1$

Correct Answer
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Find the domain of the function. - $f ( x ) = x ^ { 2 } + 1$

Correct Answer
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Use the graph to find the indicated function value. -y = f(x) . Find f(-4)

Correct Answer
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Find the indicated function value. - $\begin{array}{l}\begin{array} { c | c } x & f ( x ) \\\hline - 3 & 0 \\- 1 & 10 \\0 & 15 \\1 & 20 \\3 & 30\end{array}\\\text { Find } f ( - 1 ) \end{array}$

Correct Answer
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Find the domain and range. - $\{ ( - 4,13 ) , ( - 3,6 ) , ( 0 , - 3 ) , ( 3,6 ) , ( 5,22 ) \}$

Correct Answer
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The graph below shows the percentage of students enrolled in the College of Engineering at State University. Use the graph to answer the question. -If f(x) = 15%, what year is represented by x?

Correct Answer
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Use the vertical line test to determine whether or not the graph is a graph of a function. -

Correct Answer
verified

Use the vertical line test to determine whether or not the graph is a graph of a function. -

Correct Answer
verified

Find the indicated function value. - $f ( x ) = x + 3 , g ( x ) = x - 4$ Find $( f + g ) ( - 5 )$ .

Correct Answer
verified

Decide whether the relation is a function. - $\{ ( - 6,5 ) , ( - 6 , - 7 ) , ( 1,2 ) , ( 6,6 ) , ( 9,8 ) \}$

Correct Answer
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Exam 8: Basics of Functions

Find the indicated function value. - Find f(−2) when f(x) =5x2+4x+1\text { Find } f ( - 2 ) \text { when } f ( x ) = 5 x ^ { 2 } + 4 x + 1 Find f(−2) when f(x) =5x2+4x+1

Correct AnswerverifiedShow Answer

Find the domain of the function. - f(x) =x2+1f ( x ) = x ^ { 2 } + 1f(x) =x2+1

Correct AnswerverifiedShow Answer

Use the graph to find the indicated function value. -y = f(x) . Find f(-4)

Correct AnswerverifiedShow Answer

Find the indicated function value. - xf(x) −30−110015120330 Find f(−1) \begin{array}{l}\begin{array} { c | c } x & f ( x ) \\\hline - 3 & 0 \\- 1 & 10 \\0 & 15 \\1 & 20 \\3 & 30\end{array}\\\text { Find } f ( - 1 ) \end{array}x−3−1013​f(x) 010152030​​ Find f(−1) ​

Correct AnswerverifiedShow Answer

Find the domain and range. - {(−4,13) ,(−3,6) ,(0,−3) ,(3,6) ,(5,22) }\{ ( - 4,13 ) , ( - 3,6 ) , ( 0 , - 3 ) , ( 3,6 ) , ( 5,22 ) \}{(−4,13) ,(−3,6) ,(0,−3) ,(3,6) ,(5,22) }

Correct AnswerverifiedShow Answer

The graph below shows the percentage of students enrolled in the College of Engineering at State University. Use the graph to answer the question. -If f(x) = 15%, what year is represented by x?

Correct AnswerverifiedShow Answer

Use the vertical line test to determine whether or not the graph is a graph of a function. -

Correct AnswerverifiedShow Answer

Use the vertical line test to determine whether or not the graph is a graph of a function. -

Correct AnswerverifiedShow Answer

Find the indicated function value. - f(x) =x+3,g(x) =x−4f ( x ) = x + 3 , g ( x ) = x - 4f(x) =x+3,g(x) =x−4 Find (f+g) (−5) ( f + g ) ( - 5 ) (f+g) (−5) .

Correct AnswerverifiedShow Answer

Decide whether the relation is a function. - {(−6,5) ,(−6,−7) ,(1,2) ,(6,6) ,(9,8) }\{ ( - 6,5 ) , ( - 6 , - 7 ) , ( 1,2 ) , ( 6,6 ) , ( 9,8 ) \}{(−6,5) ,(−6,−7) ,(1,2) ,(6,6) ,(9,8) }

Correct AnswerverifiedShow Answer

Find the indicated function value. - $\text { Find } f ( - 2 ) \text { when } f ( x ) = 5 x ^ { 2 } + 4 x + 1$

Correct Answer
verified

Find the domain of the function. - $f ( x ) = x ^ { 2 } + 1$

Correct Answer
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Correct Answer
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Find the indicated function value. - $\begin{array}{l}\begin{array} { c | c } x & f ( x ) \\\hline - 3 & 0 \\- 1 & 10 \\0 & 15 \\1 & 20 \\3 & 30\end{array}\\\text { Find } f ( - 1 ) \end{array}$

Correct Answer
verified

Find the domain and range. - $\{ ( - 4,13 ) , ( - 3,6 ) , ( 0 , - 3 ) , ( 3,6 ) , ( 5,22 ) \}$

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Find the indicated function value. - $f ( x ) = x + 3 , g ( x ) = x - 4$ Find $( f + g ) ( - 5 )$ .

Correct Answer
verified

Decide whether the relation is a function. - $\{ ( - 6,5 ) , ( - 6 , - 7 ) , ( 1,2 ) , ( 6,6 ) , ( 9,8 ) \}$

Correct Answer
verified