Domain
Range
Is this table/graph a function?
Is this scenario a function?
Piecewise Functions
100
Identify the domain. 
-2 ≤ x ≤ 2
OR greater than or equal to -2 and less than or equal to 2
100
Identify the range. 
0 ≤ y ≤ 4
greater than or equal to 0 and less than or equal to 4
100
Function? Yes or no? 
NO. It fails the vertical line test
100
Student to ID number
Each student (input) only gets assigned one ID number (output)
IT'S A FUNCTION.
100
Find the value of C(40) and what does it represent?
C(40) = 15 if you bought 40 shirts the cost per shirt would be $15
200
Identify the domain.
greater than or equal to - 4 and less than or equal to 4
200
Identify the range.
greater than or equal to - 5 and less than or equal to 5
200
Function? YES OR NO?
Yes. every input is assigned exactly one output
200
The number of days in a month represents the domain and the months represent the range
Not a function
200
Write the function rules for the following piecewise function
C(w) = 46 0 < w <= 1
48 1 < w <= 2
50 2 < w <= 3
52 3 < w <= 4
54 4 < w <= 5
56 5 < w <= 6
300
Identify the domain.
the domain is greater than or equal to - 1 and less than 3
300
Identify the range
greater than - 5 and less than or equal to 3
300
EXPLAIN. Why is this graph a function? 
It passes the VERTICAL LINE TEST
300
Person's last name to a Person's first name
There can be more than one person with the last name Lopez (input) that have different first names!
(Mr. and Ms. Lopez, Isai Lopez & Cristina Lopez)
NOT A FUNCTION
300
State the domain
Domain is greater than 0 and less than or equal to 6
400
Identify the domain. 
greater than or equal to - 3 and less than or equal to 3
400
Identify the range. 
- 4 <= y <= 3
range is greater than or equal to -4 and less than or equal to 3
400
Function or not?
NO!
The input of 20 has two different outputs (40 and 42).
The input of 22 has two different outputs (41 and 42).
400
The number of apples bought to the amount paid in the store
If two people buy two apples (input) each, you should expect that both person's pay the same amount (output)
IT'S A FUNCTION
400
State the range
Range is 1.25, 2.5, 4, 5.75, 7.75, 10
500
Identify the domain.
the domain is greater than - 3 and less than or equal to 1
500
Identify the range.
the range is greater than or equal to - 4 and less than or equal to 0
500
On your board, create an x-y table that is NOT a function.
Answers vary
500
A person to the length of their shadow when standing in the sun
The person's (input) shadow cannot be two different measurements if only the sun is hitting it
YES IT'S A FUNCTION
500
How many seconds are there in a year? "Trick Question"
12 of them.
January 2nd, February 2nd, March 2nd, April 2nd, May 2nd, etc...