1. Chapter 2 Linear Equations and Functions

2. Sect. 2.1 Functions and their Graphs Relation – a mapping or pairing of input values with output values domain – input values range – output values Function – a relation in which there is exactly one output for each input

3. Identify the domain and range. Then tell whether the relation is a function or not. -3 2 3 -2 1 -3 Input Output 1.

4. -3 1 2 1 3 InputOutput 2.2. 3.3. -4 1 2 7 250250 InputOutput

5. Coordinate plane Ordered pairs Quadrants

6. -4 1 2 7 250250 Graph the function 4.

7. Vertical line test A relation is a function if and only if no vertical line intersects the graph of the relation at more than one point.

8. Use the vertical line test to determine whether the relation is a function or not. 5.5. 6.

9. 7.7.

10. A Function can be represented by an equation in 2 variables. The solution is an ordered pair (x, y). Use a table of values to graph the function.

11. Linear function – must be in the form y = mx + b Function notation – f(x) = mx + b

12. Decide whether the function is linear. Then evaluate when x = 3. 9.

13. 10.