Function Vocab
Evaluating Function Rules
Vocabulary
Graphing
Is it a Function?
100
True or False-A relation is a set of ordered pairs
TRUE
100
Evaluate y=-3x if x=2
-6
100
A relation that pairs each input with exactly one output.
A function
100
The point (1,2) is in this quadrant
1st quadrant
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
y=2x+1 if x=-2
-3
200
Identify the independent variable:
The amount of time you spend studying affects your grades.
The amount of time you spend studying?
200
How do you graph the point (-3,4)?
You go left 3 units on the x-axis then go up 4 units on the y-axis?
200
Does this mapping represent a function?
No, because 2 has two different outputs.
300
The set of second coordinates in a relation or a function
The range
300
Evaluate y=-3 - x if x=6
-9
300
What is the domain of the function containing the points {(2,3), (4,5), (6,7), (8,9)}
{2, 4, 6, 8}
300
The signs of the points in quadrant 2
What is the (- , +)?
300
Is it a function?
| x | y |
| 2 | 4 |
| 1 | 5 |
| 2 | 6 |
NO because x (input, domain) repeats with different y (output, range) values
400
A relation that assigns exactly one value in the range to each value in the domain?
A function
400
Evaluate y =25 + 4x if x=5
45
400
What is the range of the function containing the points {(2,3), (4,5), (6,7), (8,9)}
{3,5,7, 9}
400
The quadrant that doesn't contain one of these points (-2,3), (3,-4) (2,3)
Third quadrant
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 y =-(4x+2) if x=7
-30
500
The function a = -4b + 14 represents the number of avocados (a) you have left after making batches (b) of guacamole.
Identify the dependent variable.
The number of avocados you have left.
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 (fails) the Vertical Line Test