1. Turn to the back page in your little green book.

2. Add these vocab words: When you add or subtract to get the next term in a sequence Sequence Term Common Difference Arithmetic Sequence The same number is added or subtracted An individual number in a sequence A set of numbers in a certain order

3. Objective: Determine if a sequence is arithmetic and find the next term in a sequence. Lesson 4-7

4. Vocabulary (put this on your note sheet) Arithmetic Sequence: A sequence (list) of numbers with a common difference Common Difference: The number that is added to a number in the sequence to get the next number

5. 21, 24, 27, 30… Arithmetic sequence +3 Common difference Terms 3336

6. Example 7-1a Determine whether –15, –13, –11, –9,... is arithmetic. Justify your answer. –15–13–11 –9 +2 Answer: There is a common difference of 2. This sequence IS arithmetic. +2 Example 1

7. Determine whether each sequence is arithmetic. a. 2, 4, 8, 10, 12,... b. 5.9, 5.5, 5.1, 4.7, …. Example 7-1c Answer: This is NOT an arithmetic sequence. Answer: This IS an arithmetic sequence. 24810 12 +2 +4 +2 5.95.55.14.7 -0.4

8. Example 7-2a Find the next three terms of the arithmetic sequence. –8, –11, –14, –17,... –8–11–14 –17 –3 –3 –3 The common difference is –3. -8 -11 -14 -17 –3 Answer: The next three terms are –20, –23, –26. Find the common difference Example 2 Continue this pattern: -20 –3 -23 –3 -26

9. Example 7-2b Find the next three terms of the arithmetic sequence. 5, 12, 19, 26,... Answer: 33, 40, 47 51219 26 +7 +7 +7 How did we get this answer?? The common difference is 7. +7 33 +7 40 +7 47

10. Next, you should: 1. Copy the assigned problems down from the next slide 2. Go to the Glenco website (log in directions are on the course syllabus) 3. For chapter 4, complete the self check quizzes for sections 4.3 4.3 4.4 4.4 4.5 4.5 4.6 4.6 4.7 4.7 4. E-mail your results for each to lynne@westottawa.net lynne@westottawa.net 5. Complete the assignment from your book For each of these quizzes, SHOW YOUR WORK on your note page from today

11. Assignment: 1. Lesson 4-7, p. 236 #15-26 2. Go to the Glenco website and complete the Strongly Recommended: 2. Chapter 4 Study Guide and Review, p. 246 #17-20, 24, 26, 28, 31, 34, 37-41, 46, 50 Chapter 4 Test: Monday *** If you want to check out fun links such as Coolmath.com, you must : 1.Show both completed assignments above 2.Complete all 5 self check quizzes from Glenco and e-mail results to Mrs. Lynn at lynne@westottawa.net