1. y = 20 – 2x __________ Warm-Up 10/30/12 y x y 2 4 6 $ x
Maria has a craving for ice cream. She has $20 and each scoop costs $2. Fill out the function table and graph how much money she has after buying x scoops of ice cream. y 20
y = 20
– 2x 18
__________ 16 14 x y 2 4 6 12 $ 10 8 6 4 2 x 1 2 3 4 5 6 7 8 9 10
scoops of ice cream

2. Cornell Notes Standards:
MCC9-12.F.IF.1 Understand that a function from one set (called the domain) to another set (called the range) assigns to each element of the domain exactly one element of the range. If f is a function and x is an element of its domain, then f(x) denotes the output of f corresponding to the input x. The graph of f is the graph of the equation y = f(x). (Draw examples from linear and exponential functions.)
MCC9-12.F.IF.2 Use function notations, evaluate functions for inputs in their domains, and interpret statements that use function notation in terms of a context. (Draw examples from linear and exponential functions.)
MCC9-12.F.IF.5 Relate the domain of a function to its graph and, where applicable, to the quantitative relationship it describes. * (Focus on linear and exponential functions.)
View the Power Point from Walch Education “Function Notation and Evaluating Functions”
View Function Notes Word Document

3. Independent Practice: In exercises 1-2, write the relationship using function notation, that is (y is a function of x is written y = f(x))

4. Tuesday Oct. 30, 2012 “Functioning Well” Work in groups
Tuesday Oct. 30, 2012 “Functioning Well” Work in groups. Accountable talk.
1-4
5-8
Persevere through each problem
Submit at the end of the period.

5. Closing10/30/12 Response to Essential Question: Index Card Homework
EQ: How do I know if a relation is a function, and how can I represent it?
Blank Side Lined Side
Your response
Essential Question:
Homework
What are functions? Activity Sheet