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Interactive
CK-12 Foundation

Inverse Variation Models: Speedometer for Inverse Variation Models

For Students 9th - 12th Standards
Model inverse variation while solving a real-world problem. Young scholars use the interactive lesson to discover the pattern of inverse variation data. They then use that discovery to write and analyze an equation.
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Handout
Del Mar College

Formulas for Elementary and Intermediate Algebra

For Students 6th - 9th Standards
Give your scholars the support they need to work with formulas. A reference page offers definitions and picture examples of perimeter, area, surface area, volume, the Pythagorean theorem, a variety of shapes, and more. 
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Worksheet
Curated OER

Relations and Functions

For Students 11th
For this relations and functions worksheet, 11th graders solve and complete 10 various types of multiple choice problems. First, they use the same relation between two variables as the given table to determine the value of one variable...
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Worksheet
Curated OER

Direct Variation

For Students 8th - 11th
In this direct variation worksheet, students answer 4 multiple choice questions that involve identifying a direct and constant variation and writing the direct variation equation.
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Unit Plan
Oswego City School District

Regents Exam Prep Center: Direct Variation

For Students 9th - 10th
This site gives a definition for direct variation and an example problem.
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Activity
Texas Instruments

Texas Instruments: Numb3 Rs: Barging In

For Teachers 9th - 10th Standards
Based off of the hit television show NUMB3RS, this lesson exposes students to equations of variation (direct, inverse, and joint) in the real world, as well as having students work with such equations in the real world context. The...
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Unknown Type
McGraw Hill

Mc Graw Hill: Inverse Variation [Pdf]

For Students 9th - 10th Standards
This is a page on inverse variation taken from a textbook. Contains a definition, examples, and practice problems with answers.
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Activity
Lawrence Hall of Science

The Math Page: Skill in Algebra: Variation

For Students 9th - 10th Standards
Here is a site that clearly and thoroughly explains direct and inverse variation. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to students who have been...
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eBook
Math Planet

Math Planet: Algebra 2: Rational Expressions: Variation

For Students 9th - 10th
Provides an explanation and examples of variation.