Quiz about Unit 3: Functions

Question 1

State the Range of this relation: {(6,91),(1,-23),(-2,4),(-2,3),(3,4)}

Accepted Answer

{-23,3,4,91}

Answer

{6,1,-2,3}

Answer

[91,-23,4,3]

Answer

N/A

Answer

{3,1,9,4,20}

Question 2

If f(x) = 3x + 4x + 5x + 2, find f(3)

Accepted Answer

38

Answer

21

Answer

39

Answer

21

Answer

12x + 2

Question 3

On a graph, how do you tell if the relation is a function?

Accepted Answer

Vertical Line Test

Answer

Horizontal Line Test

Answer

You cannot

Answer

Plug in values until you get an error

Question 4

.

Accepted Answer

Not a Function

Answer

Function

Question 5

Is this a function? Explain.

Accepted Answer

Yes; it passes the vertical line test.

Answer

Yes; it passes the horizontal line test.

Answer

No; it is not a straight line.

Answer

No; there is a line connecting the dots.

Question 6

The function h(t) represents the height in inches of a plant after t weeks. What does the notation h(4) = 5 mean?

Accepted Answer

After 4 weeks the plant is 5 inches tall

Answer

After 5 week the plant is 4 inches tall

Answer

The plant grows at a rate of 5/4 inch per week

Answer

The plant grows at a rate of 1 inch per week

Question 7

Determine which of the following is NOT a function.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 8

Determine which of the following is a function.

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 9

What is the range?

Accepted Answer

{0, 4, 7}

Answer

{-3, -1, 2, 4}

Answer

{0, 4, 4, 7}

Answer

{7, 4, 0}

Question 10

Question 10.

Accepted Answer

continuous

Answer

discrete

Question 11

Question 11.

Accepted Answer

Discrete

Answer

Continuous

Question 12

All of the y values or outputs are called what?

Accepted Answer

Range

Answer

Domain

Question 13

All of the x values or inputs are called what?

Accepted Answer

Domain

Answer

Range

Question 14

Question 14.

Accepted Answer

Not a Function

Answer

Function

Question 15

Is this graph a function or not a function?

Accepted Answer

Function

Answer

Not a Function

Question 16

Is this mapping a function or not a function?

Accepted Answer

Function

Answer

Not a Function

Question 17

Is this graph a function or not a function?

Accepted Answer

Not a Function

Answer

Function

Question 18

Is this graph a function or not a function?

Accepted Answer

Function

Answer

Not a Function

Question 19

Is this table a function or not a function?

Accepted Answer

Function

Answer

Not a Function

Question 20

Does this table represent a function?

Accepted Answer

Yes

Answer

No

Question 21

Does this table represent a function?

Accepted Answer

No

Answer

Yes

Question 22

A relation where every input yields one and only one output is called what?

Accepted Answer

Function

Answer

Relation

Answer

Linear

Answer

Exponential

Question 23

Which relation is NOT a function?

Accepted Answer

{(1,-5), (-1,6), (1,5), (6,-3)}

Answer

{(1,-5), (3,1), (-5,4), (4,-2)}

Answer

{(2,7), (3,7), (4,7), (5,8)}

Answer

{(3,-2), (5,-6), (7,7), (8,8)}

Question 24

In the given relation, what domain value corresponds to the range value -2?
{(-1,2), (-2,4), (2,5), (0,-2), (2,0)}

Accepted Answer

0

Answer

-2

Answer

2

Answer

4

Question 25

For h(x) = x³ + 2x, find h(4).

Accepted Answer

72

Answer

20

Answer

14

Answer

64

Question 26

Which of the following is not a function?

Accepted Answer

{(0,2), (1,3), (4,3), (1,2)}

Answer

{(0,1), (1,2), (2,3), (3,4)}

Answer

{(1,3), (4,2), (2,0), (3,4)}

Answer

{(1,2), (2,2), (3,2), (4,2)}

Question 27

Is this mapping a function or not a function?

Accepted Answer

Not a Function

Answer

Function

Question 28

Question 28.

Accepted Answer

Not a Function

Answer

Function

Question 29

Is this a function?

Accepted Answer

Yes

Answer

No

Question 30

Is this a function?

Accepted Answer

Yes

Answer

No

Question 31

Is this a function?

Accepted Answer

Yes

Answer

No

Question 32

What is the domain?

Accepted Answer

the set of all x-values

Answer

the set of all y-values

Question 33

What is the range?

Accepted Answer

the set of all y-values

Answer

the set of all x-values

Question 34

If you were to use the input values of 1, 2, 3, 4. What would your output values be in the following function

f(x) = 2x + 5

Accepted Answer

7, 9, 11, 13

Answer

7, 8, 9, 10, 11

Answer

10, 20, 30, 40

Answer

3, 2, 1, 0

Question 35

In an 82 game season, Dwight Howard averaged a total of 20.7 points per game. His approximate total points scored per game is a function of the amount of games played. Which statement below is true?

Accepted Answer

Total points is dependent on the number of games played

Answer

The number of games played is dependent on the number of points scored

Answer

82 games was played

Question 36

- # of hours worked
- amount of your paycheck
Which is the dependent variable?

Accepted Answer

paycheck amount

Answer

hours worked

Question 37

- speed of car
- speeding ticket amount
Which is the independent variable?

Accepted Answer

speed of car

Answer

speeding ticket amount

Question 38

Evaluate f(-4) for the function f(x)=3x²-5

Accepted Answer

f(-4) = 43

Answer

f(-4) = 139

Answer

f(-4) = -52

Answer

f(-4) = -149

Question 39

A relation is a set of:

Accepted Answer

ordered pairs.

Answer

pictures.

Answer

random numbers.

Answer

geometric figures.

Question 40

Sarah is bringing treats to her elementary school class on her birthday. The number of treats she brings in is based on the number of students in her class.
t = the number of treats
s = the number of students
Which of the variables is independent?

Accepted Answer

s

Answer

t

Question 41

Carey and Justin are raising money to purchase books for their school's library. The more money they raise, the more books they will be able to purchase for the library.
m = the amount of money Carey and Justin raise
b = the number of books Carey and Justin will be able to purchase
Which of the variables is dependent?

Accepted Answer

b

Answer

m

Question 42

On a graph, which axis shows the dependent variable?

Accepted Answer

y-axis

Answer

x-axis

Answer

neither

Answer

it changes

Question 43

On a graph, which axis shows the independent variable?

Accepted Answer

x-axis

Answer

y-axis

Answer

neither

Answer

it changes

Question 44

In order to raise money for the school dance, students in leadership class are collecting cans to recycle. When they recycle x bags of cans, they make f(x) dollars to put toward the dance.

What does f(20)=60 tell you?

Accepted Answer

The students make $60 when the recycle 20 bags of cans.

Answer

The students make $20 when the recycle 60 bags of cans.

Question 45

In physics class, the students found that it takes a force of f(x) newtons to accelerate a wagon that weighs x pounds.

What does f(8)=25 tell you?

Accepted Answer

It takes 25 newtons to accelerate a 8-pound wagon.

Answer

It takes 8 newtons to accelerate a 25-pound wagon.

Question 46

Jason poured a cup of hot coffee and let it cool. The temperature of the coffee after x minutes is given by the function f(x). The temperature is measured in degrees Fahrenheit.

What does f(10)=120 tell you?

Accepted Answer

The temperature of the coffee is 120^oF after 10 minutes.

Answer

The temperature of the coffee is 10^oF after 120 minutes.

Question 47

Blake works as a groundskeeper at a racetrack, where he is part of a bigger crew. When x people are working on the crew, it takes them f(x) hours to get the track ready for a day of racing.

What does f(8)=4 tell you?

Accepted Answer

When there are 8 people working, it takes 4 hours to ready the track.

Answer

When there are 4 people working, it takes 8 hours to ready the track.

Question 48

Kenny makes clay sculptures and ships them to buyers throughout the country. The function f(x) gives the cost, in dollars, of shipping a box that weighs x pounds.

What does f(7) < 10 tell you?

Accepted Answer

It takes Kenny less than $10 to ship a box weighing 7-pounds.

Answer

It takes Kenny less than $7 to ship a box weighing 10-pounds.

Question 49

f(x)=x²-5x
f(4)=

Accepted Answer

-4

Answer

126

Answer

24

Answer

84

Question 50

f(x) = 3x² - 11
Find f(-5)

Accepted Answer

f(-5) = 64

Answer

f(-5) = -86

Answer

f(-5) = 214

Answer

f(-5) = -7

Question 51

Evaluate the function:

f(a) = 2 ^. 3^a; find f(2)

Accepted Answer

(2, 18)

Answer

(18, 2)

Answer

(3, 9)

Answer

9

Question 52

Evaluate the function:

g(x) = x³ + 2 + x ; find g(1)

Accepted Answer

(1, 4)

Answer

(4, 6)

Answer

(1, 3)

Answer

(4, 1)

Question 53

Evaluate the function:

h(t) = 3^{t - 1} ; find h(2)

Accepted Answer

(2, 3)

Answer

(1, 2)

Answer

(9, 3)

Answer

(3, 9)

Question 54

Evaluate the function:

f(x) = 2 ^. 2^{x - 2} + 2 ; find f(3)

Accepted Answer

(3, 6)

Answer

(3, 2)

Answer

(2, 4)

Answer

(2, 6)

Question 55

Evaluate the function:

y(a) = 3^{2a + 1} ; find y(1)

Accepted Answer

(1, 27)

Answer

(2, 36)

Answer

(4, 72)

Answer

(1, 81)

Question 56

Which cartoon is this ?

Accepted Answer

Mickey mouse

Answer

Mr bean

Answer

Dora

Answer

Tom and Jerry

Question 57

Which cartoon is this ?

Accepted Answer

Sponge bob

Answer

Dragon booster

Answer

Pokemon

Answer

Mr bean

Unit 3: Functions

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