Quiz about More Functions Review # 2

Question 1

Write the function rule to represent the total cost, c, of PLAN A for m, months.

Accepted Answer

c = 260+70m

Answer

c = 260m + 70

Answer

m = 70c + 260

Answer

m = 70 + 260c

Question 2

Write the function rule to represent the total cost, c, of PLAN B for m, months.

Accepted Answer

c = 82m

Answer

c = 82m + 1

Answer

m = 82c

Answer

m = 82c + 1

Question 3

If Jacy plans to keep the phone for 24 months, which plan is cheaper?

THE NEXT SLIDE WILL SHOW YOU THE WORK!

Accepted Answer

Plan A

Answer

Plan B

Answer

They are the same

Question 4

Which plan has a proportional relationship? and Why?

Accepted Answer

Plan B because you get the phone for free

c = 82m

Answer

Plan A because the phone cost $260

c = 70m + 260

Answer

Neither of them

Answer

Both of them

Question 5

Q.2A Find the slope for this relationship.

Accepted Answer

3

Answer

1/3

Answer

-3

Answer

-1/3

Question 6

Q.2B Find the y-intercept.

Accepted Answer

8

Answer

14

Answer

17

Answer

3

Question 7

Q.2C Write an equation in slope intercept form that represents this relationship.

Accepted Answer

y=3x+8

Answer

3x+8

Answer

8x+3

Answer

y=8x+43

Question 8

Question 8.

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 9

Question 9.

Accepted Answer

-5

Answer

10

Answer

15

Answer

5

Question 10

Reminder: A relation is a FUNCTION when each x-value has one and only one y-value.

Look to see if x repeats with a different y value.

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 11

Q. 6 - State the domain of this relation.

Accepted Answer

{1,2,5,7,3}

Answer

{9,7,4,12,9}

Answer

{1,2,5,7,3,9}

Answer

{9,7,4,12}

Question 12

Q. 6 - State the range of this relation.

Accepted Answer

{9,7,4,12}

Answer

{1,2,5,7,3}

Answer

{9,7,4,12,9}

Answer

{1,2,5,7,3,9}

Question 13

Question 13.

Accepted Answer

Set B is a function and set A is not because for set B, each input has one and only one output.

Answer

Set A is a function and set B is not because for set A, each input has one and only one output.

Answer

Neither of them is a function.

Answer

Both of them are functions because for both each x-value has one and only one y-value.

Question 14

Which has the SMALLEST rate of change(slope)?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 15

9A. Is this relation a function?

Accepted Answer

No because there is an x-value repeated with 2 different y-values.

Answer

Yes because each x-value has one and only one y-value.

Answer

Yes because each y-value has one and only one y-value.

Answer

No because there is an y-value repeated with 2 different y-values.

Question 16

9B. Is this relation a function?

Accepted Answer

Yes because each x-value has one and only one y-value.

Answer

No because there is an x-value repeated with 2 different y-values.

Answer

Yes because each y-value has one and only one y-value.

Answer

No because there is an y-value repeated with 2 different y-values.

Question 17

9C. Is this relation a function?

Accepted Answer

No because there is an x-value repeated with 2 different y-values.

Answer

Yes because each x-value has one and only one y-value.

Answer

Yes because each y-value has one and only one y-value.

Answer

No because there is an y-value repeated with 2 different y-values.

Question 18

10. Function or not a function?

Accepted Answer

Function because it passes the vertical line test.

Answer

Function because it fails the vertical line test.

Answer

Not a Function because it passes the vertical line test.

Answer

Not a Function because it fails the vertical line test.

Question 19

11. Function or not a function?

Accepted Answer

Not a Function because it fails the vertical line test.

Answer

Function because it passes the vertical line test.

Answer

Function because it fails the vertical line test.

Answer

Not a Function because it passes the vertical line test.

Question 20

12. Function or not a function?

Accepted Answer

Function because it passes the vertical line test.

Answer

Function because it fails the vertical line test.

Answer

Not a Function because it passes the vertical line test.

Answer

Not a Function because it fails the vertical line test.

Question 21

13A.

Reminder: To be a LINEAR function, an equation needs to be able to be in y=mx+b form.

Accepted Answer

Linear because it is in y = mx + b form

Answer

NonLinear because it is in y = mx + b form

Answer

Linear because it is NOT in y = mx + b form

Answer

NonLinear because it is NOT in y = mx + b form

Question 22

13B.

Reminder: To be a LINEAR function, an equation needs to be able to be in y=mx+b form.

Accepted Answer

NonLinear because it is NOT in y = mx + b form

Answer

Linear because it is in y = mx + b form

Answer

NonLinear because it is in y = mx + b form

Answer

Linear because it is NOT in y = mx + b form

Question 23

13C.

Reminder: To be a LINEAR function, an equation needs to be able to be in y=mx+b form.

Accepted Answer

NonLinear because it is NOT in y = mx + b form

Answer

Linear because it is in y = mx + b form

Answer

NonLinear because it is in y = mx + b form

Answer

Linear because it is NOT in y = mx + b form

Question 24

14a. Write an equation for the temperature, T, at n hours after noon.

Accepted Answer

T= 30 - 3n

Answer

T = 3n - 30

Answer

T = 27 - 3n

Answer

T = 27n

Question 25

14B

What is the y-intercept of the line the equation represents. What does the y-intercept tell us about the problem?

Accepted Answer

30

The starting temperature is 30 degrees

Answer

30

The temperature is increasing by 30 degrees per hour

Answer

3

The temperature is decreasing by 3 degrees per hour

Answer

-3

The temperature is decreasing by 3 degrees per hour

Question 26

14C

What is the slope of the line? What does the slope tell us about the situation?

Accepted Answer

-3

The temperature is decreasing by 3 degrees per hour

Answer

30

The temperature is increasing by 30 degrees per hour

Answer

3

The temperature is decreasing by 3 degrees per hour

Answer

30

The starting temperature is 30 degrees

Question 27

15

Part A...Explain why the relationship between the number of people and cost is LINEAR for both tables.

Accepted Answer

A, B & C

Answer

A

Both tables have a constant rate of change which makes them both linear.

Answer

B

Rollaway skates is linear because the cost increases by $5 per person

Answer

C

Wheelie's Skates and Stuff is linear because the cost increases by $3 per person

Question 28

15

Part B...Write an equation for the cost and number of people in slope-intercept form for

ROLLAWAY SKATES

Accepted Answer

y = 5x

Answer

y = 5x + 10

Answer

y = 5x + 5

Answer

y = 5

Question 29

15

Part B...Write an equation for the cost and number of people in slope-intercept form for

WHEELIE'S SKATES AND STUFF

Accepted Answer

y = 3x + 100

Answer

y = 100x

Answer

y = 3x

Answer

y = 100

Question 30

15

Part C...Which company has a proportional relationship and why?

Accepted Answer

Rollaway Skates

because 0 people costs $0

Answer

Rollaway Skates

because for each person you pay $5.

Answer

Wheelie's skates & stuff

because 0 people costs $100

Answer

Wheelie's skates & stuff because for each person you pay $3.

Question 31

Susie said the relation is a FUNCTION. Do you think Susie is correct? Explain why or why not.

Accepted Answer

Both A and B

Answer

A

Susie is correct because each x - value has one and only one y-value.

Answer

B

Susie is correct because the x - values do not repeat.

Answer

Susie is not correct because there is an x-value with 2 different y-values.

Question 32

State the DOMAIN.

Accepted Answer

{-4,-2,0,2,4,6}

Answer

{16,4,0,4,16,36}

Answer

{16,4,0,36}

Answer

{2,4,6}

Question 33

State the RANGE.

Accepted Answer

{16,4,0,36}

Answer

{-4,-2,0,2,4,6}

Answer

{16,4,0,4,16,36}

Answer

{2,4,6}

Question 34

Jimmy said the relation is a LINEAR FUNCTION. Do you think he is correct? Explain why or why not.

Accepted Answer

Jimmy is incorrect because there is not a constant rate of change.

Answer

Jimmy is correct because there is a constant rate of change.

Answer

Jimmy is correct because y decreases by 4 while x increases by 2.

Answer

Jimmy is incorrect because the table is wrong.

Question 35

Linear or Nonlinear

Accepted Answer

Both A and B

Answer

A

Linear because as y decreases by 2, x increases by 3.

Answer

B

Linear because there is a constant rate of change.

Answer

NonLinear because there isn't a constant rate of change,

Question 36

Linear or Nonlinear

Accepted Answer

NonLinear because there isn't a constant rate of change,

Answer

A

Linear because as y decreases by 3, x increases by 1.

Answer

B

Linear because there is a constant rate of change.

Answer

Both A and B

Question 37

Linear or Nonlinear

Accepted Answer

Both A and B

Answer

A

Linear because as y increases by 15, x increases by 5.

Answer

B

Linear because there is a constant rate of change.

Answer

NonLinear because there isn't a constant rate of change,

Question 38

Function or Not a Function

Accepted Answer

Both A and B

Answer

A

Function

because each x-value has one and only one y-value

Answer

B

Function

because x doesn't repeat with a different y.

Answer

Not a Function because there is an x-value with more than one y-value.

Question 39

Function or Not a Function

Accepted Answer

Not a Function because there is an x-value with more than one y-value.

X repeats

Answer

A

Function

because each x-value has one and only one y-value

Answer

B

Function

because x doesn't repeat with a different y.

Answer

Both A and B

Question 40

Function or Not a Function

Accepted Answer

Both A and B

Answer

A

Function

because each x-value has one and only one y-value

Answer

B

Function

because x doesn't repeat with a different y.

Answer

Not a Function because there is an x-value with more than one y-value.

X repeats

Question 41

Function or Not a Function

Accepted Answer

Not a Function because there is an x-value with more than one y-value.

X repeats

Answer

A

Function

because each x-value has one and only one y-value

Answer

B

Function

because x doesn't repeat with a different y.

Answer

Both A and B

Question 42

Function or Not a Function

Accepted Answer

Both A and B

Answer

A

Function

because each x-value has one and only one y-value

Answer

B

Function

because x doesn't repeat with a different y.

Answer

Not a Function because there is an x-value with more than one y-value.

X repeats

Question 43

Function or Not a Function

Accepted Answer

Not a Function because there is an x-value with more than one y-value.

X repeats

Answer

A

Function

because each x-value has one and only one y-value

Answer

B

Function

because x doesn't repeat with a different y.

Answer

Both A and B

Question 44

Function or Not a Function

Accepted Answer

Both A and B

Answer

A

Function

because each x-value has one and only one y-value

Answer

B

Function

because the graph passes the vertical line test

Answer

Not a Function because the graph fails the vertical line test

Question 45

Function or Not a Function

Accepted Answer

Not a Function because the graph fails the vertical line test

Answer

A

Function

because each x-value has one and only one y-value

Answer

B

Function

because the graph passes the vertical line test

Answer

Both A and B

Question 46

21. What is the slope of the line.

Accepted Answer

1/2

Answer

2

Answer

-2

Answer

-1/2

Question 47

22. What is the slope of the line.

Accepted Answer

Both B & C

Answer

A1

Answer

B-1

Answer

C-2/2

Question 48

23. What is the slope of the line.

Accepted Answer

-5/4

Answer

5/4

Answer

1

Answer

-1

Question 49

Question 49.

Accepted Answer

slope = 1/2

y-intercept = -9

y = 1/2x - 9

Answer

slope = -1

y-intercept = -9

y = -x - 9

Answer

slope = 1

y-intercept = -9

y = x - 9

Answer

slope = -1/2

y-intercept = -9

y = -1/2x - 9

Question 50

Question 50.

Accepted Answer

slope = -5/4

y-intercept = .5

y = -5/4x + .5

Answer

slope = 5/4

y-intercept = -.5

y = 5/4x - .5

Answer

slope = 4/5

y-intercept = .5

y = 4/5x +.5

Answer

slope = -4/5

y-intercept = -.5

y = -4/5x - .5

Question 51

Question 51.

Accepted Answer

slope = 1

y-intercept = 5

y = x + 5

Answer

slope = -1

y-intercept = 5

y = -x + 5

Answer

slope = 1

y-intercept = -4

y = x - 4

Answer

slope = -1

y-intercept = -4

y = -x - 4

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