1. Pre-Algebra 5-5 Coordinate Geometry 6/1/2010 Slope#27 Today’s Plan: -Intro to slope video -Slope practice LT: I will identify the slope of a line. Entry Task: What is the slope of a line? What did you learn about slope in Science? *TURN IN TEXTBOOKS

2. Pre-Algebra 5-5 Coordinate Geometry Slope is a number that describes how steep a line is.

3. Pre-Algebra 5-5 Coordinate Geometry 6/1/2010 Slope#27 Today’s Plan: -Intro to slope video -Slope practice LT: I will identify the slope of a line. Video

4. Pre-Algebra 5-5 Coordinate Geometry The slope of a horizontal line is 0. The slope of a vertical line is undefined. slope = vertical change horizontal change = rise run slope = rise run

5. Pre-Algebra 5-5 Coordinate Geometry 6/1/2010 Slope#27 Today’s Plan: -Intro to slope video -Slope practice LT: I will identify the slope of a line. Slope is a number that describes how steep a line is. slope = rise run + - 0 Undefined

6. Pre-Algebra 5-5 Coordinate Geometry Additional Example 1A: Finding the Slope of a Line Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line. A. XY positive slope; slope of XY = = –5 –4 5454

7. Pre-Algebra 5-5 Coordinate Geometry Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line. B. ZA negative slope; slope of ZA = = – –1 2 1212 Additional Example 1B: Finding the Slope of a Line

8. Pre-Algebra 5-5 Coordinate Geometry Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line. C. BC slope of BC is undefined Additional Example 1C: Finding the Slope of a Line

9. Pre-Algebra 5-5 Coordinate Geometry Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line. D. DM slope of DM = 0 Additional Example 1D: Finding the Slope of a Line

10. Pre-Algebra 5-5 Coordinate Geometry Try This: Example 1A Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line. A. AB A C B D F E H G positive slope; slope of AB = 1 8

11. Pre-Algebra 5-5 Coordinate Geometry B. CD slope of CD is undefined Try This: Example 1B Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line. A C B D F E H G

12. Pre-Algebra 5-5 Coordinate Geometry C. EF slope of EF = 0 Try This: Example 1C Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line. A C B D F E H G

13. Pre-Algebra 5-5 Coordinate Geometry D. GH Try This: Example 1D Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line. A C B D F E H G negative slope; slope of GH = = – –1 3 1313