Function Vocab
Evaluating Function Rules
Writing Function Rules
Graphing
Is it a Function?
100
True or False-A relation is a set of ordered pairs
TRUE
100
Evaluate f(x)=-3x if x=2
f(x)=-6
100
Given the points write a function rule (0,-2);(1,-1); (2,0)
What is y=x-2?
100
The point (1,2) is in this quadrant
QUADRANT 1
100
Is it a function? {(2, 3), (4, 5), ( -2, 6)}
YES because x does not repeat
200
The set of first coordinates of a relation or a function
DOMAIN
200
Evaluate f(x)=2x+1 if x=-2
f(x)=-3
200
Given the points write a function rule (0,0); (1,3); (2,6)
What is y=3x?
200
How do you graph the point (-3,4)?
Left 3 units on the x-axis then go up 4 units on the y-axis
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
300
The set of second coordinates in a relation or a function
RANGE
300
Evaluate f(x)=-3 - x if x=6
f(x)=-9
300
Given the points write a function rule (0,0); (2,1); (4,2)
What is y=x/2?
300
The signs of the points in quadrant 2
(- , +)
300
Is it a function?
| x | y |
| 2 | 4 |
| 1 | 5 |
| 2 | 6 |
NO because x repeats
400
A relation that assigns exactly one value in the range to each value in the domain?
A FUNCTION
400
Evaluate f(x)=25 + 4x if x=5
f(x)=45
400
Given the points write a function rule (-1,-1); (0,1); (1,3);(2,5)
f(x)=2x+1
400
The quadrant that doesn't contain one of these points (-2,3), (3,-4) (2,3)
QUADRANT 3
400
Is it a function?
YES because it passes the Vertical Line Test
500
The test to tell if a graph is a function
VERTICAL LINE TEST
500
Evaluate f(x)=-(4x+2) if x=7
What is -30
500
Given the points write a function rule (0,5); (1,6); (2,7);(-1,4)
f(x)=x+5
500
What quadrant is the point (0,2) in?
NONE, because the point sits on the y-axis
500
Is it a function? 
NO because it does not pass the Vertical Line Test