1. Chapter 4.5: Determine the slope of a line from a graph

2. Lesson 4.5: Determining the slope of a line Definition Slope: Tells how steep a line is Not very steep Really steep

3. Lesson 4.5: Determining the slope of a line Slope = Rise/Fall Run Think of slope as how the line moves across the page so slope is abbreviated with an m for movement. m= rise/fall run

4. Lesson 4.5: Determining the slope of a line by looking at a graph. x y Find where the line hits at a intersection Slope = Rise/Fall Run m = -2 4 m= -1 2

5. Lesson 4.5: Determining the slope of a line by looking at a graph. x y Find where the line hits at a intersection Slope = Rise/Fall Run 2 3 m =

6. Lesson 4.5: Determining the slope of a vertical line ALL vertical lines have equations like: x = any number x y x = -3 Slope is undefined. x = 4 4 Or -3 0 are undefined.

7. Lesson 4.5: Determining the slope of a horizontal line x y y = +2 Slope is 0. ALL horizontal lines have equations like: y = any number y = -3 0 or 0 2 -3 Slopes = 0