1. TODAY IN GEOMETRY…  STATs for Ch.3.1-3.3 Quiz  Learning Goal 2: 3.4 Calculate Parallel and Perpendicular Slopes with a graph and algebraically  Independent Practice

2. HOW DID YOU “SHAPE” UP?? Results for ALL of my Geometry classes: GRADE NUMBER OF STUDENTS WHO TOOK THE CH.3 QUIZ (17 pts.) 1 ST PERIOD3 RD PERIOD5 TH PERIOD6 TH PERIODTOTAL A277622 B5911631 C684725 D451616 F602210 Avg.22.5425.9726.7024.9125.03

3. KINDS OF SLOPES

4. UNDEFINED ZERO POSITIVE INCREASING NEGATIVE DECREASING

5. Used in Graphing

6. REVIEW: CALCULATING SLOPE WITH A GRAPH

7. Find the slope of AB A B Find two points that are on crosshairs. (exact points)

8. PRACTICE: Find the slope of the given line.

10. REVIEW: CALCULATING SLOPE GIVEN TWO POINTS

11. Find the slope of AB: A(-2, 8) B(3, 2) PREDICT: Do you expect to have an increasing or decreasing slope? NEGATIVE = DECREASING SLOPE

12. Find the slope of CD: C(5,-2) D(-4,1) PREDICT: Do you expect to have an increasing or decreasing slope? NEGATIVE = DECREASING SLOPE

13. REVIEW: SLOPE STEEPNESS

14. Which line is steeper? Greater the absolute value of the slope = steeper

15. SLOPES OF PARALLEL AND PERPENDICULAR LINES

17. Which of the following lines are parallel or perpendicular? A B C D E F

18. Give the PARALLEL and PERPENDICULAR slopes for the following lines.

19. Line m passes through ( -1, 3) and (4, 1). Line t passes through (-2, -1) and (3, -3). Are the two lines parallel, perpendicular or neither.

20. *To calculate the perpendicular slope, you must determine the slope first.

21. HOMEWORK #4: Pg. 175: 1-27 odd 28-30 If finished, work on other assignments: HW #1: Pg. 150: 11-15, 18-23, 24-32, 43-44 HW #2: Pg. 157: 4-19, 22-24, 27-31, 33, 35, 36 HW #3: Pg. 165: 3-15, 19-21, 23, 26, 27