1. 2.1: Represent Relations and Functions HW: p.76 (4-20 even, 21-23 all)
Algebra II
2.1: Represent Relations and Functions
HW: p.76 (4-20 even, all)

2. What is a relation?
A relation is a mapping, or pairing, of input values with output values.
The set of input values is the domain, and the set of output values is the range. (Typically the domain is represented as x and the range is represented as y.)

3. Identify the domain and range for the following relation
Identify the domain and range for the following relation. Represent the relation using a table and a mapping diagram.
1.) (-4, 3), (-2, 1), (0, 3), (1, -2), (-2, -4)

4. Identify the domain and range for the following relation
Identify the domain and range for the following relation. Represent the relation using a table and a mapping diagram.
2.) (-2, -3), (-1, 1), (1, 3), (2, -2), (3, 1)

5. What is a function?
A function is a relation for which each input has exactly one output.
If any input has more than one output, then the relation is not a function.

6. Determine if the relation is a function.
1.)
2.)

7. Determine if the relation is a function.
3.)
4.)

8. Determine if the relation is a function.
5.)

9. Determine if the relation is a function.
6.) (-1, -1), (2, 5), (4, 8), (-5, -9), (1, -1)

10. Determine if the relation is a function.
7.) (2, -5), (-2, 5), (-1, 4), (-2, 0), (3, -4)

11. Determine if the relation is a function.
8.) )
10.)