Function Vocab
Function Notation
Is it a function?
Is it a Linear Function?
Al jeh Brehhh
100
True or false:
Not all relations are functions, but all functions are relations.
True
100
Evaluate f(x)=-3x if x=2
-6
100
Is it a function? {(2, 3), (4, 5), ( -2, 6)}
YES because x does not repeat
100
(0,1) (2,2) (4,3)
yes
100
2x +1 = 15
x =7
200
The set of inputs of a relation
Domain
200
Evaluate f(x)=2x+1 if x=-2
-3
200
Using the vertical line test does the graph of the points (1,3) and (1,5) represent a function?
False, the points fail the vertical line test
200
(0,0)(2,10) (3,20) (4, 30)
nope
200
-5t - 9 = 3t + 7
t = -2
300
The set of outputs of a function
Range
300
Evaluate f(x)=-3 - x if x=6
-9
300
Is it a function?
| x | y |
| 2 | 4 |
| 1 | 5 |
| 2 | 6 |
NO because x repeats
300
All play: Write the equation of a linear function on your board.
It can be any linear function
Many answers
300
(4d + 5)/7 = 2
9/4 or 2.25
400
A relation where every input has exactly one output.
function
400
Evaluate f(x)=-(4x+2) if x= banana
-(4banana + 2)
400
Is it a function?
YES because it passes the Vertical Line Test
400
y/3 - 3x = 1
yes
y = 9x +3
400
4(f -2) < 4f
All real numbers
500
The test to tell if a graph is a function
The Vertical Line Test
500
f(x) = x^3 + 2x
What is f(-2)?
-12
500
Is it a function? 
NO because it does not pass the Vertical Line Test
500
All Play:
On your whiteboards, rewrite this in the form
y=mx +b (If possible)
2(y + 3x) - 10 = 0
y = -3x + 5
500
|x + 10| > 3
x> -7 or x < -13