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 ?

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

Unit 3 Modeling Linear Relationships

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

Rate of change Consider the situation illustrated by Investigation 1

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

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)

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 Amount of pay

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

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

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=

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

In your notes define Slope and y- intercept