1. Warm-up
Graph:
4x – 6y = 18
Write the equation of the line with slope ½ and through the point (4, -5). Use point slope form.
Write it in slope intercept form

2. 3.6 Slopes of Parallel and Perpendicular Lines
10/31 with practice on 11/1

3. Learning Targets
I can tell if two lines are parallel or perpendicular by finding their slopes.
I can write equations of parallel and perpendicular lines.

4. Parallel Lines have equal slopes (and different y intercepts)
Line 1 contains A(-4, 2) and B(3, 1)
Line 2 contains C(-4, 0) and D(8, -2)
Are Lines 1 and 2 Parallel? Hint, find the slopes

5. Are Lines 4y – 12x = 20 and y = 3x -1 Parallel?
Are lines y = x + 6 and 2x + 4y = 20 Parallel?

6. Write an equation for the line parallel to y = -4x + 3 and through the point (1, -2)

7. Perpendicular Lines have slopes that are negative reciprocals of each other (their product is -1)
What is a negative reciprocal?

8. Line 1 goes through (-2, 3) and (6, -3)
Are lines 1 and 2 Perpendicular? Hint: find the slopes

9. Are the following lines perpendicular?
2x – 7y = -42
4y = -7x – 2

10. Are the following lines perpendicular?
2x + 3y = 6
6x – 4y = 24

11. Write an equation of a line Perpendicular to y = -3x + 5 and through the point (-3, 7)

12. Write the equation for a line that contains (1, 8) and is perpendicular to y = ¾ x + 1

13. No homework, but be prepared to practice this further.

14. Day 3 Review (11/1)
Practice worksheet with follow up quiz on Monday

15. Monday 11/4 Review, go over hmwk wkst, review problems
Quiz with mins left

16. Homework p. 314 #2-36 even