1. Do Now

2. represent relations Interpret graphs of relations
Section 1.6 Relations
represent relations
Interpret graphs of relations
SWBAT:

3. Relations y-axis (vertical axis) x-axis (horizontal axis) Origin
(0, 0) center
x-axis
(horizontal axis)

4. Definitions Ordered pair: A point (coordinate)
(x coordinate, y coordinate)  (x, y)
Relation:
A set of ordered pairs
Domain:
Input value (x-coordinate)
Range:
Output value (y-coordinate)

5. Function cont… A function is like a machine.
You input a value and a value is “spit” out. 3 9 1 4 1
y = 2x + 1
Domain: Input (x value)
Range: Output (y value)

6. Different Representations of a Relation
Table
Graph
Mapping

7. Examples
1. Express {(2, 5), (-2, 3), (5, -2), (-1, -2)} as a table, graph, and a mapping. 2. What is the domain & range?

8. Examples
1. Express {(4, -3), (3, 2), (-4, 1), (0, -3)} as a table, graph, and a mapping. 2. What is the domain & range?

9. Examples: pg 40 Example 3
The graph represents the distance Francesca has ridden on her bike. Describe what happens in the graph? As time increases  the distance increases for a period of time, then become constant (so she took a break), then increased her speed (she started to peddle again)

10. Guided Practice: Think-Pair-Share
Pg #7, 8

11. Homework
Section 1.6 #’s 9 – 14, 17 – 20, 21 – 23