1. 3.7 Finding equations of lines.

2. Ex 1 Find the equation of a line thru 2 points

3. Ex 2

4. Ex 3

5. How to find the vertical and horizontal lines thru any point?

7. H.W. pg 194
30-41 all and W.S.

8. 3.8 Slopes of Parallel and Perpendicular lines.

9. Rules: #1 all vertical lines or horizontal lines are parallel.
#2 Any other lines are ll , if they have equal slopes.
#3 Any one vertical line and one horizontal line are perpendicular.
#4 Any other lines , if the slopes multiply and equal -1 they are perpendicular.

10. #5 IN other words perpendicular slopes are opposite reciporcal
#5 IN other words perpendicular slopes are opposite reciporcal. (or flip the slope and change the sign) love Bonin

11. Quick Review : slope equation

12. Example #2 Find the slope of each pair of points line p (-4,2) (0,-4) and
line t (-5,-3) (4,3). Are they Parallel , perpendicular or neither?

13. Find the equation of lines.

14. Find the equation of lines.

15. H.W. pg 201
7-21 odd show all work!
23-26 all