Lesson 3
1. Lesson 3
1.3. Refresher
Module 1: Sequences and Series
Refresher
In the video Direct and Partial Variation: Arithmetic Sequences you will encounter the terms direct variation and partial variation. You are not required to know what these terms mean. However, in order to easily follow along, you should know that
- any linear function with a y-intercept of zero exhibits direct variation
- any linear function with a non-zero y-intercept exhibits partial variation
Search the Internet if you would like more information on direct variation and partial variation.
Watch Direct and Partial Variation: Arithmetic Sequences. Work through slides 1 to 11. You will review
-
the basic properties of arithmetic sequences
- the relationship between arithmetic sequences and linear functions
For the next two review pieces, click on “Solving Linear Systems Algebraically” after you click on each play button below. Then click on the “Tutorial” button at the top of the applet. You will then be able to select each of the topics listed here:
- Solving Linear Systems Algebraically: Substitution
- Solving Linear Systems Algebraically: Elimination
Once you have completed the tutorial, select “Example” at the top of the applet in order to try some guided questions.
picture: iStockphoto/Thinkstock
picture: David Sacks/Lifesize/Thinkstock
Go back to the Are You Ready? questions and try them again. If you are still having difficulty, contact your teacher.