1. Scrabble What is the value of your last name in Scrabble points?
1 point: E, A, I, O, N, R, T, L, S, U
2 points: D, G
3 points: B, C, M, P
4 points: F, H, V, W, Y
5 points: K
8 points: J, X
10 points: Q, Z

2. Lecture: Day 1B Pre AP & GT Precalculus
Functions:
Precalculus in one word
Lecture: Day 1B Pre AP & GT Precalculus

3. Definition of Function
A relation which associates one and only one output value to each input value
Birthday Example…find two of the same bday in class and associate to the numbers in the diagram

4. No, the value 2 in set A corresponds to both B and C in set B
Example #1
Use brief bullets and discuss details verbally.
No, the value 2 in set A corresponds to both B and C in set B

5. Example #2
Use brief bullets and discuss details verbally.
Yes, Each value in set A corresponds to one and only one value in set B

6. How do we say it? Which is correct? Person is a function of birth date
If the we are given a function with an input, in, and an output, out:
We say: OUT is a function of IN
Which is correct?
Birth date is a function of person OR
Person is a function of birth date

7. Is height a function of weight?
Input: weight output: height
Yes, each weight has one and only one height

8. Is weight a function of height?
Input: height output: weight
No, the height 60 inches is associated to both 204 pounds and 120 pounds

9. Scrabble Questions?
Is the number of letters in your last name a function of last name?
Is your last name a function of its number of letters?
Is your point value a function of last name?
Is your last name a function of point value?

10. Is the number of letters in your last name a function of last name?
Yes, Each of your last name’s
has an associated point value

11. Is your last name a function of its number of letters?
No, for instance 5 letters
corresponds to more than
one last name (Smith & Jones)

12. Is your point value a function of last name?
Yes, each last name has only
one point value

13. Is your last name a function of point value?
No, Eight Points is associated
with more than one name
(e.g. Ford and Story)