1. Materials Reminders

2. Determine whether the relationship between x and y is proportional or nonproportional? x.631.261.892.52 y.3465.6931.03951.386

3. Get out your agenda if you see your name below. I would like to have you in my FLEX Wednesday. Period 2Period 7 Guillermo M. Anthony N. Maddy P. Sonja R. Gunnar S. Ellis W. Justin T. Jacob B. Grace K. Jalen R. Jacenta K. Bogdan K.

4. 4-3 Proportional and Nonproportional Relationships How do I find rates of change?

5. Important Vocabulary Rate of Change – a rate that describes how one quantity changes in relation to another

6. Questions:Notes: How do I determine POSITIVE rates of change? Steps 1.Determine the difference between two quantities within each category. 2.Write the results as a unit rate (hint: time is usually used as the denominator. 3.If the unit rate is a positive number, you have a positive rate of change. Example: Shrimp5000 tons7000 tons Year20122013 The rate of change is positive because there is an increase of 2000 tons per year.

7. Questions:Notes: How do I determine NEGATIVE rates of change? Steps 1.Determine the difference between two quantities within each category. 2.Write the results as a unit rate (hint: time is usually used as the denominator. 3.If the unit rate is a negative number, you have a negative rate of change. Example: Shrimp5000 tons3000 tons Year20122013 The rate of change is positive because there is an decrease of 2000 tons per year.

8. Philosophical Chairs If a liquid is poured into a flask (pictured below) at a constant rate, what will a graph of the height of the liquid as a function of time look like. Time Ht. Time Ht. Time Ht. A B C

9. Homework Page 201-203; 1-15 and 27-29 AND Cornell Notes Summary