1. Homework: Maintenance Sheet 8.12
Due Thursday
Answer questions 1-2 on Unit 3 review

2. Relations and Functions
A relation is a pairing between two sets of numbers
It is usually written as a set of ordered pairs
Example:
{(11, 63), (12, 64), (13, 65), (14, 70), (15, 72), (16, 72)}
A function is a special type of relation, where your x coordinate does not repeat.

3. A function is a special type of relation, where your x coordinate does not repeat.

4. Domain and Range {(1, 3), (3, 5), (4, 3), (2, 8)}
{(3, 7), (10, 13), (4, 9), (10, 8), (12, 4)}
The domain of a relation is the set of first coordinates of the ordered pairs
The range of a relation is the set of second coordinates of the ordered pairs
We can also visualize this graphically

5. Linear Functions
Sometimes, instead of writing coordinates that belong to a certain function, we write them as an equation with two variables, usually x and y
Examples:
Each of these has infinite solutions that can be written in coordinate form
d = 5t
3x + 2y = 10
y = 5x
-10p = 2q +1

6. I can determine if a table, graph, or set of ordered pairs is or is not a function and justify my conclusion.
I can explain the difference between a relation and a function.

7. I can determine if a table, graph, or set of ordered pairs is or is not a function and justify my conclusion.
I can explain the difference between a relation and a function.

8. I can determine if a table, graph, or set of ordered pairs is or is not a function and justify my conclusion.
I can explain the difference between a relation and a function.

9. *Do not let the vinegar and *Do not use too much vinegar
*No horse playing
*Do not let the vinegar and
Baking soda mix
*Do not use too much vinegar

10. Remember LAB safety rules/procedures
I can determine if a table, graph, or set of ordered pairs is or is not a function and justify my conclusion.
I can explain the difference between a relation and a function.
Materials Needed
Water bottle
“ghost’ (balloon)
Marker
Vinegar
Baking soda
Spoon, Paper/pencil, Ruler, graph paper, Timer/stopwatch
Time
Height
What will be the height of your ghost in 15 seconds, 20 seconds, 25 seconds, 30 seconds, and 35 seconds?
Create a table and graph related to your graph.
Does a proportional relationship exist between the time and height of your ghost?
Is the information you have graph represent a function? Explain
Is your graph linear or non-linear? Explain.
Compare the class data, does the class data represent a function? Explain

11. Is there a relationship between the time and height of your ghost and the class?
I can determine if a table, graph, or set of ordered pairs is or is not a function and justify my conclusion.
I can explain the difference between a relation and a function.

12. Function or Not Explain TOD
I can determine if a table, graph, or set of ordered pairs is or is not a function and justify my conclusion.
I can explain the difference between a relation and a function.
Function or Not
Explain
TOD