Function Vocab
Evaluating Function Rules
Interval Notation
Domain & Range
Is it a Function?
100
If the y-values (RANGE) of a function REPEAT then IT IS NOT A FUNCTION
FALSE
100
f(x)=-3x
if f(2)
-6
100
Express the following in Interval Notation
-8 ≤ x < 8
[-8,8)
100
Identify the domain and range . 
domain: [-2,2]
Range : [0,4]
100
Is it a function? {(2, 3), (4, 5), ( -2, 6)}
YES because x does not repeat
200
What is Domain?
The set of X-VALUES a relation or a function
200
f(x)=2x+1
if f(-2)
-3
200
Express the following in Interval Notation
-9 < x ≤ -4
(-9,-4]
200
Identify the domain.
[-4, oo)
200
Are the following ordered pairs a FUNCTION:
(1, 2) (-1, -3) (0, 4) (5, -6) (1, 2)
YES, the X repeats but with the same Y
300
What is the range?
The set of Y-VALUES in a relation or a function
300
f(x)=x^2+6x-2
if f(6)
70
300
TRUE OR FALSE: You use brackets when the Domain or Range has infinity.
FALSE: infinity always gets parenthesis.
300
Identify the domain.
[-1,5]
300
Is it a function?
| x | y |
| 2 | 4 |
| 1 | 5 |
| 2 | 6 |
NO because x repeats
400
Read this out loud:
f(x) = 3x+7
f of x equals...
400
f(x)=25 + 4x
if f(x)=45
5
400
Look at the Graph. Write the inequality in interval notation.
[-4, -1)
400
What is the range of the function?
(-oo,oo)
400
Is it a function?
(2, 4) (3, 4) (4, 4) (5, 4)
YES because the X does not repeat.
500
What is the Vertical Line Test?
The test to tell if a graph is a function
500
f(x)=-4x-2
find f(x)=-30
7
500
TRUE OR FALSE: You should always right domain and range in order from least to greatest.
True. Left to right or bottom to top.
500
What is the DOMAIN of this graph?
(-3,oo)
500
Is it a function? 
NO, because it does not pass the Vertical Line Test