Function Lab

Chapter 9

Question 1

Does the table represent a function?YES or NO

X Y

12 -1

7 0

4 1

3 2

4 3

7 4

Remember:The “X”s are all different if it is a function

Question 2

Does the graph represent a function?YES or NO

Remember:The graph of a function does not cross above or below itself.

Question 3

Is this mapping a function?YES or NO

Remember:The “X”s are all different if it is a function

HINT: The points in the mapping are …

(8,7) , (12,0) , (12,3) , (15,7)

Question 4

Does the set of ordered pairs represent a function?

Yes or No(1,8) , (2,11) , (3,14) , (4,17) , (5,20)

Remember:The “X”s are all different if it is a function

Question 5

What is the domain, range, and inverse of the table?

X Y

-4 10

-1 8

2 6

5 4

8 2

11 0

Remember:Domain – all the XsRange – all the YsInverse – the points listed as (y,x)

Question 6

F(x) = x + 15

Find these values1. F(4) =2. F(8) =3. F(12) =

Question 7

What are the domain, range, and inverse of the mapping below?

Remember:Domain – all the XsRange – all the YsInverse – the points listed as (y,x)

HINT: The points in the mapping are …

(3,4) , (6,4) , (10,2)

Question 8

Find the domain, range, inverse of the function below:

(5,10) , (6,12) , (7,14) , (8,16) , (10,18)Remember:Domain – all the XsRange – all the YsInverse – the points listed as (y,x)

Question 9

F(x) = x – 4

1. What is the output if the input is 13?2. What is the range if the domain is 20?

Remember:Domain – the inputRange – the output

Question 10

Multiple Choice: Which function increases the input by 8?

A. F(x) = x – 8B. F(x) = x + 8C. F(x) = 8xD. F(x) = x / 8