1. S ECTIONS 3.6 & 3.7 E QUATIONS OF L INES 1/13

2. W HAT IS S LOPE ? The slope of a line is the ratio of the vertical change (rise) to the horizontal change (run). 7 - 2 2/13

3. D ETERMINING THE S LOPE ? (Grid) Count out the rise and run. (Points) Use the Slope Formula The Same 3/13

4. P RACTICE Find the slope of a line that passes through the points (-3,3) and (4, 7). Input your answer in this format #/# 4/13

5. S LOPES OF P ARALLEL L INES In a coordinate plane, 2 lines are parallel if and only if they have the same slopes. Undefined 5/13

6. S LOPES OF P ERPENDICULAR L INES In a coordinate plane, 2 lines are perpendicular if and only if they have the negative reciprocal slopes. 0 Undefined 6/13

7. Slope Y Intercept E QUATIONS OF L INES Slope Point 7/13

8. E QUATIONS OF L INES Write an equation of a line through the point (2, 3) that has a slope of 5. 8/13

9. E QUATIONS OF L INES Write an equation of the line through the point (4, 9) that has a slope of -2. 9/13

10. E QUATIONS OF L INES Write an equation of the line through the point (4, 9) and point (2,5). 10/13

11. E QUATIONS OF L INES (P ARALLEL ) Write the equation of a line that is parallel to the line and passes through the point (3, 2). 11/13

12. E QUATIONS OF L INES (P ERPENDICULAR ) Write the equation of a line that is perpendicular to the line and passes through the point (-5, 4). 12/13

13. H OMEWORK 3.6 & 3.7 P. 168 7–9, 17–19, 27–29, 33 – 38, 42, 57 P. 175 7–12, 21–22, 25, 29, 42 - 44 13/13