SOL 
A.8  The student, given a situation in a realworld context, will analyze a relation to determine whether a direct or inverse variation exists, and represent a direct variation algebraically and graphically and an inverse variation algebraically.


Common Core Standards 

Warmup 
 ExamView Quiz: Solving Literal Equations

Lessons 
 Notes: Direct
Variation (ppt)
 Notes: Direct Variation #2  related to slope (ppt)
 Notes:
Direct/Indirect Variation (doc) 
(pdf)
 Notes: Direct and Inverse Variations (ppt) *New 2009 SOL Content*
 Notes: Direct and Inverse Variations #2 (ppt) *New 2009 SOL Content*

Videos 
 Video: PH Using Direct Variation to Describe a Situation
 Video: PH Using a Proportion as an Equation of Direct Variation
 Video: PH Using a Proportion to Solve a Direct Variation Problem
 Video: PH Using Inverse Variation *New 2009 SOL Content*

Explore Learning 
 Direct Variation: Adjust the constant of variation and explore how the graph of the direct variation function changes in response.
 Direct and Inverse Variation: Adjust the constant of variation and explore how the graph of the direct or inverse variation function changes in response. Compare direct variation functions to inverse variation functions.

Geogebra 

Internet
Sites 
 Interactive
Notes: Direct Variation  lessons and practice
problems at Regentsprep.org

Tasks 

Homework 
 Direct Variation
Worksheet (doc)
 Glencoe PWS (pdf)
 Glencoe SG (pdf)

Journal 

Direct Variation: Write down three things that you know about
direct variation problems. Give examples to support your ideas.

Formula: Describe your favorite
mode of transportation. Then write a problem using the formula
d=rt
and your favorite mode.

Study Guide 
 ExamView Quiz: Direct Variation
 Prentice Hall Quiz

Other 
