1. 3-3 RATE OF CHANGE February 10 2015

2. Objectives I can determine the rate of change of a line from a graph I can determine the rate of change of a line from coordinates I can use slope to describe the rate of change

3. Agenda What is Rate of Change? How does it relate to graphing linear functions? Constant Rate of Change Finding Slope using a Graph Slopes of Horizontal and Vertical Lines

4. What is Rate of Change? Rate of Change: allows you to see the relationship between two quantities that are changing Slope: rate of change of a line

6. Rate of Change with a Graph

7. Constant Rate of Change If the rate of change is constant, the function is linear The rate of change does not have to be constant though (think about the ski problem example) We use the letter m to represent slope in equations

8. Slope

9. Rise over Run For Rise: If you move up, the number is positive If you move down, the number is negative For Run: If you move left, the number is negative If you move right, the number is positive

10. Example Problem Determine the slope using the table below. Is this a linear function. Answer Yes or No. Hours spent stalking on Instagram (x) Number of photos scrolled through of your crazy ex (y) 124 248 496 6144

12. HOMEWORK PG. 177 Problems 4, 5, 14, and 15