Function
Vocab
Vocab
Functions
Writing Domain and Range
Domain
Range
100
True or False-A relation is a set of ordered pairs
What is TRUE?
100
Is it a function?
x | y
2 | 4
1 | 5
2 | 6
What is NO because x repeats?
100
What kind of brackets do you use to write domain and range?
curly brackets
100
What is the domain of a function?
The set of all x-values
100
What is a range of function?
The set of all y-values
200
The set of first coordinates of a relation or a function
What is domain?
200
Is it a function? {(2, 3), (4, 5), ( -2, 6)}
What is YES because x does not repeat?
200
Can there be repeated values in the range?
Yes
200
State the domain:{(1,3) (5,8) (2,1) (3,3) (4,9) (6,3)}
D: {1, 2, 3, 4, 5, 6}
200
DAILY DOUBLE: What is "cynophobia"?
What is: the fear of dogs
300
The set of second coordinates in a relation or a function
What is the range?
300
Is this a function?
(Pic - Functions 300)
Yes, the for each x value there is exactly one y value
300
If x has two values for y, does it make it a function?
No, x can only have one exactly value for y
300
What is the domain of the following set of ordered pairs and is it a function?
D: {-2, 0, 1, 3}
300
What is the range of the following set of ordered pairs?
{(2, 1) (-1, 0) (-1, 3) (0, 2) (-5, 1)}
R: {0, 1, 2, 3}
400
A relation that assigns exactly one value in the range to each value in the domain?
What is a function?
400
Is it a function? Justify your answer.
{(2, 3), (4, 5), ( -2, 6)}
Yes, each input has exactly one output.
400
How do you perform the vertical line test?
You draw a vertical line on the graph and it should only touch it once
400
State the domain:
x | y
3 | 7
5 | 9
3 | 8
D: {3, 5}
400
State the Range:
x | y
3 | 7
5 | 9
3 | 8
R: {7, 8, 9}
500
The test to tell if a graph is a function
What is the Vertical Line Test?
500
Using the vertical line test, does the graph of the points (1,3) and (1,5) represent a function?
No, the points fail the Vertical Line Test.
500
The domain and range are given as:
D: {-3, 4, 7, 10}
R: {2, 5, 8}
Is this a function?
Yes, because the y values can repeat but not the x values
500
State the domain:
x | y
4 | -4
-5 | 9
1 | 0
-5 | 3
D: {-5, 1, 4}
500
State the range:
x | y
4 | -4
-5 | 9
1 | 0
-5 | 3
R: {-4, 0, 3, 9}