Quiz about Functions and Direct Variation

Question 1

In a direct variation, y=39 when x=3.  Find the value of y when x=2.

Accepted Answer

26

Answer

3

Answer

58.5

Answer

2

Question 2

The amount of money earned on a job varies directly with the number of hours worked. If $70.00 is earned in 5 hours, how much money is earned in 22 hours of work?

Accepted Answer

$308

Answer

$2

Answer

$1.57

Answer

$265

Question 3

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

Accepted Answer

Function

Answer

Relation

Answer

Linear

Answer

Exponential

Question 4

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 5

All of the x values or inputs are called what?

Accepted Answer

Domain

Answer

Range

Answer

Relation

Answer

Function

Question 6

All of the y values or outputs are called what?

Accepted Answer

Range

Answer

Domain

Answer

Relation

Answer

Function

Question 7

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 8

Is the relation a function? Why.

Accepted Answer

No, because the x-value 11 has two y-values pair with it.

Answer

Yes, because the x-value 11 has two y-values pair with it.

Answer

Yes, because each x-value has only one y-value paired with it.

Answer

No, because each x-value has only one y-value paired with it.

Question 9

Which graph does NOT pass the vertical line test?

Accepted Answer

Graph 1

Answer

Graph 2

Answer

Graph 3

Answer

Graph 4

Question 10

Trina's paycheck earnings varies directly as the number of hours she works. If she works 19 hours and earns $187.15, what should she earn if she worked 40 hours?

Accepted Answer

$394

Answer

$440

Answer

$472.80

Answer

$512.20

Question 11

Is this graph a function or not a function?

Accepted Answer

Function

Answer

Not a Function

Question 12

Is this mapping a function or not a function?

Accepted Answer

Function

Answer

Not a Function

Question 13

y varies directly with x. If y = 20 when x = 4, what is y when x = -2 ?

Accepted Answer

-10

Answer

10

Answer

-5

Answer

5

Question 14

y varies directly with x. If y = 12 when x = 2 AND y = 30 when x = 5, what is the constant of variation ( y = kx )?

Accepted Answer

k = 6

Answer

k = 12

Answer

k = 4

Answer

k = 2

Question 15

If y varies directly with x, and y = 21 when x = -7, what is y when x = 42?

Accepted Answer

-126

Answer

14

Answer

-14

Answer

126

Question 16

Is this graph a function or not a function?

Accepted Answer

Function

Answer

Not a Function

Question 17

Function or not a function?

Accepted Answer

Not a Function

Answer

Function

Question 18

Function or NOT a function?

Accepted Answer

Function

Answer

Not a Function

Question 19

Is the graph pictured a function?

Accepted Answer

No

Answer

Yes

Question 20

Is this mapping a function or not a function?

Accepted Answer

Not a Function

Answer

Function

Question 21

Function or not a function?

Accepted Answer

Function

Answer

Not a Function

Question 22

Function or NOT a function?

Accepted Answer

Not a Function

Answer

Function

Question 23

Is this set of ordered pairs a function or not a function?

Accepted Answer

Not a Function

Answer

Function

Question 24

Is this set of ordered pairs a function or not a function?

Accepted Answer

Function

Answer

Not a Function

Question 25

On a treasure map, the actual distance is directly related to the scaled distance. If 15 actual miles is represented by 3 centimeters, then how many centimeters on the treasure map are equivalent to 135 miles?

Accepted Answer

27 cm

Answer

675 cm

Answer

529 cm

Answer

32 cm

Question 26

Is this mapping a function or not a function?

Accepted Answer

Not a Function

Answer

Function

Question 27

Is this table a function or not a function?

Accepted Answer

Not a Function

Answer

Function

Question 28

Is this graph a function or not a function?

Accepted Answer

Not a Function

Answer

Function

Question 29

Which set of values is a function?

Accepted Answer

(6,-5) (7, -3) (8, -1) (9, 1)

Answer

(9,5) (10,5) (9,-5) (10,-5)

Answer

(3,4) (4,-3) (7,4) (3, 8)

Answer

(2, -2) (5, 9) (5, -7) (1, 4)

Question 30

For the function {(0,1), (1,-3), (2,-4), (-4,1)}, write the domain and range.

Accepted Answer

D:{-4, 0, 1, 2 }

R:{-4, -3 ,1}

Answer

D: {-4, -3, 1}

R: {-4, 0, 1, 2}

Answer

D:{0, 1, 2, 3, 4}

R:{-4, -3, 1}

Question 31

Which ordered pair could you add to the following list of points to create a function?  (3, 5) (4, 9) (2, 5)

Accepted Answer

(1, 9)

Answer

(3, 7)

Answer

(4, 1)

Answer

(2, 6)

Question 32

Does the table represent a function?

Accepted Answer

No, there is a repeated x-value.

Answer

Yes, there  is a repeated x-value.

Answer

No, there aren't any repeated y-values.

Answer

Yes, there are repeated y-values.

Question 33

Give the domain and range. Tell if it is a function.

Accepted Answer

D: {-4, -2, 0, 2}
R: {-2, 1}
Function

Answer

D: {-4, -2, 0, 2}
R: {-2, -2, 1, 1}
Function

Answer

D: {-4, -2, 0, 2}
R: {-2, -2, 1, 1}
Not a Function

Answer

D: {-4, -2, 0, 2}
R: {-2, 1}
Not a Function

Question 34

Does this relation represent a function?
(1,5), (1,6), (1,7), (1,8), (1,9)

Accepted Answer

No

Answer

Yes

Question 35

You can identify a function from a graph by using the.....

Accepted Answer

Vertical Line Test

Answer

Horizontal Line Test

Answer

Eye Test

Answer

Diagonal Line Test

Question 36

Does this table represent a function?

Accepted Answer

No

Answer

Yes

Question 37

What is the definition of function?

Accepted Answer

Every input has only ONE output

Answer

Has inputs and outputs

Answer

Inputs have different outputs every time

Answer

x-values and y-values

Question 38

Is the relation a function?

Accepted Answer

yes, it is a function

Answer

no, it is not a function

Answer

not enough information to determine

Question 39

Is the relation a function?

Accepted Answer

yes, it is a function

Answer

no, it is not a function

Answer

not enough information to determine

Question 40

What is the range of the relation shown on the mapping diagram?

Accepted Answer

R:{3, 5, 8}

Answer

R:{-7, 11}

Answer

R:{3, 5, 8, 12}

Answer

R:{all real numbers}

Question 41

Question 41.

Accepted Answer

Function

Answer

Not a Function

Question 42

What are the coordinates of point H?

Accepted Answer

(-2, 4)

Answer

(-4, 2)

Answer

(4, -2)

Answer

(4, 4)

Question 43

The coordinates of a point are (y, x)

Accepted Answer

False

Answer

True

Question 44

Which describes the way an ordered pair is written?

Accepted Answer

(x , y)

Answer

(y, x)

Answer

(big, small)

Answer

(small, big)

Question 45

Which way does the Y axis go?

Accepted Answer

Up and Down ^v

Answer

Side to Side <---->

Question 46

Which way does the X axis go?

Accepted Answer

Side to Side <---->

Answer

Up and Down ^v

Question 47

What is the ordered pair of point E?

Accepted Answer

(5,2)

Answer

(2,5)

Answer

(-5,2)

Answer

(5,-2)

Question 48

What is the ordered pair of point A?

Accepted Answer

(0, 6)

Answer

(6, 0)

Answer

(-6, 0)

Answer

(6, 6)

Question 49

What is the ordered pair of point C?

Accepted Answer

(6, 7)

Answer

(7, 6)

Answer

(6, 6)

Answer

(7, 7)

Question 50

What point is at (6 , 6)?

Accepted Answer

Point N

Answer

No Point

Answer

Point L

Answer

Point X

Question 51

What point is at (2 , 3)?

Accepted Answer

Point Z

Answer

Point T

Answer

Point R

Answer

No Point

Functions and Direct Variation

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