Lesson 3

1. Lesson 3

1.3. Refresher

Mathematics 20-1 Module 1

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

This is a play button for Direct and Partial Variation: Arithmetic Sequences.

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

This is a play button for 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

To further review solving linear systems algebraically, work through Module 7, Lessons 3 and 4 in Mathematics 10C Learn Everywhere.

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.