Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Direct Variation
Find a quick, concise explanation of what a direct variation is. An example is given and clearly explained.
Oswego City School District
Regents Exam Prep Center: Practice With Direct Variation
This site has eleven interactive problems dealing with Direct Variation. Allows you to answer in multiple choice format and gives an explanation for the correct answer.