Name______________________________
Date: _________________ Block: _______
Ms. Gallagher
Warm UpFind the domain and range from the following relations
1. (3, 2); (1, 4); (0, -4); (-2, 6); (-10, 9)
2. (2, 1); (2, 2); (2, 3); (2, 4); (2, 5)
1
2
3
4
3.
-3
-7
4.
Notes Finding Domain and Range by looking at the graph
Example One Domain and Range of a line
y
y
y
4
4
4
3
3
3
2
2
2
1
1
1
x
-4
-3
-2
-1
1
2
3
4
5
x
-4
-3
-2
-1
1
2
3
4
5
x
-4
-3
-2
-1
1
-1
-1
-1
-2
-2
-2
-3
-3
-3
-4
-4
-4
2
3
4
5
Example Two Domain and Range of Quadratic Functions
y
8
4
3
2
5
1
-1
1
2
3
4
1
4
x
-2
4
6
2
-3
y
7
3
-4
y
5
x
-6
3
-1
-5
-4
-3
-2
-1
-3
x
-3
-4
-2
3
-2
1
-3
2
-1
2
-2
1
-1
1
2
3
4
5
6
-4
Example Three Domain and Range of Square Root Functions
y
y
4
6
3
5
2
4
1
3
x
-4
-3
-2
-1
1
2
3
y
6
5
4
3
2
4
2
1
-1
1
x
-2
-4
-3
-2
-1
1
-3
-1
-4
-2
2
3
4
x
5
-2
-1
1
2
3
-1
-2
Example Four Domain and Range of Rational Functions
y
y
2
5
1
4
x
3
-6
-3
-2
-1
1
-2
1
-3
x
-1
-4
-1
2
-2
-5
1
2
3
4
5
6
7
-4
-1
-5
-2
-6
-3
Homework: Worksheet
2
3
4
5
6
7