1. Warm Up- Collect your worksheets from yesterday and do the Warm Up below 1.What is the rate of change? 2.What is the starting value 3.What will the graph be when x = 9 ?

2. Moving day Pack your things and head to the back of the class

3. Unit 3 Modeling Linear Relationships

4. Objective Students can find the rate of change in a linear growth or decay situation. Language objective- Students can explain the slope of a line as it pertains to rate of change

5. Rate of change Consider the situation illustrated by Investigation 1

6. Rate of change Consider the situation illustrated by Investigation 1 What is the rate of change of this graph? How can we calculate starting value To find our starting value we look to see where our graph crosses the y axis at x=o

7. Next = Now rules (in your notes) Next = now rules We need RATE OF CHANGE STARTING VALUE Next = now + (rate of change) starting at (some value)

8. Rate of change Next = Now rules Next = Now + our rate of change starting at a given number Consider the table and write a next = now equation for it Credit card sales 123456 Amount of pay10203040

9. On your worksheets from yesterday Write next = now rules for 1- 4

10. In teams work on #4 ON PAGE 154 A-D We will discuss in 7 minutes If your team finishes early start on the CYU on page 156 Also work on the CYU on page 156 A, B, D Be ready to discuss

11. Writing a y=equation (rule) from next = now equations Consider the next = now equation Next= now + 3 starting at 30 What is our rate of change? What is our starting value? We re-write our equation as a y= equation Y= (rate of change)x + starting value Y=

12. On Your classwork #4 and the CYU Re-write your next=now rules into y= equations

13. In your notes define Slope and y- intercept