1. Warm- Up #1 Monday, 2/1/2016
Reflect on your first semester in your math class and answer the following questions:
Write three new things that you have learned from last semester.
Write three things that you have done well from last semester
Write three things that you want to improve/achieve/learn from my class this second semester.

2. Warm-Up #2 Tuesday, 2/2
2y + 4 = 5x. What is the slope (m)? What is the y-intercept (b)?
Solve for y in the equation 4x – 5y =
y = 3x + 5, if y = 10, then solve for x.

3. Homework Tuesday 2/2
Plug in Values worksheet

4. Lesson 5.3 What is a Function?

5. What is “rule” mean to you?
Come up with examples when a rule applies to certain situations
Examples:

6. Functions
A function is a relation in which each element of the domain (x-values) is paired with exactly one element of the range (y-values).
f(x) y x

7. Function Notation
Input
Name of Function
Output

8. Different ways of writing
f(x) = 4x or y = 4x + 6
f(3) = 4(3) or y = 4(3) + 6

9. Determine whether each relation is a function.
1. {(2, 3), (3, 0), (5, 2), (4, 3)}
YES, every domain is different!
f(x) 2 3
f(x) 3
f(x) 5 2
f(x) 4 3

10. Determine whether the relation is a function.
2. {(4, 1), (5, 2), (5, 3), (6, 6), (1, 9)}
f(x) 4 1
f(x) 5 2
NO, 5 is paired with 2 numbers!
f(x) 5 3
f(x) 6
f(x) 1 9

11. Is this relation a function? {(1,3), (2,4), (3,3)}
Yes No X Y 1 3 2 4
Answer Now

12. Is this relation a function? {(2,3), (2,-4), (3,3)}
Yes No X Y 2 3 -4
Answer Now

13. 3(3)-2 3 7 -2 -8 3(-2)-2 Given f(x) = 3x - 2, find: 1) f(3) = 7
= -8
3(-2)-2 -2 -8

14. Given h(z) = z2 - 4z + 9, find h(-3)
(-3)2-4(-3)+9 -3 30
h(-3) = 30

15. Given g(x) = x2 – 2, find g(4) 2 6 14 18
Answer Now