1. Lesson 13-6 Pages 692-696 Graphing Quadratic and Cubic Functions

2. What you will learn! 1. How to graph quadratic functions. 2. How to graph cubic functions.

4. What you really need to know! To graph a quadratic or cubic function, make a table of values and plot the points.

6. Example 1: Graph the function: y = -2x 2

7. xy -2-8-2 00 1-2 2-8

8. Example 1b: Graph the function:

9. xy -231.5 01 11.5 23

10. Example 1c: Graph the function: y = -x 2 – 3

11. xy -2-7-4 0-3 1-4 2-7

12. Example 2: The height of a triangle is 4 times its base. Write a formula for the area and graph it. Find the area of the triangle whose base is 3 units.

13. Example 2: The area of a triangle is found by using ½bh. If h is 4b then; ½bh = ½b(4b) = 2b 2

14. Example 2: ½bh = ½b(4b) = 2b 2 If the base is 3, then: 2(3) 2 = 18 units 2.

15. a = 2b 2 ba 00 12 28

16. Example 3: Graph the function:

17. xy -241.5 00 1-1.5 2-4

18. Example 3b: Graph the function: y = 2x 3 + 2

19. xy -2-140 02 14 218

20. Page 694 Guided Practice #’s 4-10

21. Pages 692-694 with someone at home and study examples! Read:

22. Homework: Pages 694-696 #’s 12-30 even #’s 38-48 all

23. Study Guide and Review Pages 698-700 #’s 1-30 (Odd answers in back of book)

24. Prepare for Test! Page 701 #’s 1-25

25. Prepare for Test! Pages 702-703 #’s 1-8

26. Page 757 Lesson 13-6