2. Slope of lines and Construction Parallel and Perpendicular lines. Sec: 3.8 and 3.6 Sol: G.2a,d G.3b G.4c,d,g

3. Slope Slope intercept equation: y=mx+b

4. Find the Slope of the line.

5. Find the slope of the line passing through the points (-4, -5)(6, -2) Try these: 1.(0, 3)(4, 8) 2.(-5, 1)(5, -4) 3.(-3, -2)(6, 1)

6. Classification of lines by slope Negative slope Positive slope Undefined Slope Zero Slope

7. Parallel lines: Slopes have to equal. Perpendicular lines: Two lines are perpendicular IFF their slopes are negative reciprocals of each other. When you multiply the slopes together they should equal -1.

8. Determine if the lines are parallel, perpendicular, or neither. EX: y = y =

9. Ex: y = y =

10. Ex: y = -x – 7 and y – x = 20

11. Ex: 2y = 15 + 4x and 6y – 30 = 12x

12. Ex: Given P(-2, 2), Q(2, 1), R(1, -1), and S(5, -2), determine if is parallel to or perpendicular to.

13. Example Graph the line that passes through the point (3, 5) that is perpendicular to TK with T(0, 2) and K(5, 0).

15. Construct parallel and Perpendicular lines.

16. Assignments Classwork: Workbook pg 81 1-4 and pg 87 1,2,7,8,14,16,17 Homework: pg 188 40,41 and pg 201-202 2,8,10,16,18,23,24,30