1. Warm up Solve the inequality. Then graph the solution.
ANSWER
x < – 4 or x > 2

2. Homework Questions

3. Homework Questions

4. Domain and Range of Functions and Piecewise Functions

5. domain = x­-coordinates = input range = y­-coordinates = output
Key Terms:
_________ is the set of the x-­coordinates of each ordered pair of a relation or function. The domain is also the input.
domain = x­-coordinates = input
__________ is the set of the y­-coordinates of each ordered pair of a relation or function. The range is also the output.
range = y­-coordinates = output

6. Key Terms:
A ___________ is a mapping, or pairing, of input values with output values.
A ___________ is a relation for which input has exactly one output.
** If any input of a relation had more than one input , the relation in not a function.
You can use the graph to determine whether it is a function by applying the ____________.

7. Represent relations
Consider the relation given by the ordered pair (– 2, –3), (– 1, 1), (1, 3), (2, – 2), and (3, 1).

8. Identifying Functions

9. Use the Vertical Line Test

10. Graph Equation
STEP 2
Plot the points. Notice that they all lie on a line.
STEP 3
Connect the points with a line.

11. You Try It!
Graph the equation y = 3x – 2.

12. Classify and Evaluate Functions

13. Key Term:
A ____________ function is defined by at least two equations, each of which applies to a different part of the function’s domain. Ex.

14. Evaluate a Piecewise Function

15. Graph Piecewise Functions

16. Graphing a Step Function

17. Textbook – Pg. 76 3-7(odd), 11,12,21,25-31(odd) Pg. 131 1-4, 6, 7
Homework
Textbook – Pg (odd), 11,12,21,25-31(odd) Pg , 6, 7