Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Inverse and Direct Variation
Twenty problems present a variety of practice with inverse and direct variation. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution" button...
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.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Direct and Inverse Variation
Dr. Math gives hints of how to solve a problem with inverse and direct variation. The site includes how inverse and direct variation problems are set up using initial and final conditions. The student can then solve for the unknown. A...
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.
University of Regina (Canada)
University of Regina: Math Central: Direct Variation: Real World Lesson Plan
This site contains lesson plans for a unit on direct and partial variation. It includes definitions, worked examples, exercises, and solutions.
CK-12 Foundation
Ck 12: Algebra: Direct Variation
[Free Registration/Login may be required to access all resource tools.] This lesson shows you have to determine if a set of data varies directly.
Mangahigh
Mangahigh: Algebra: Direct Proportion
Mangahigh is a website with math games aimed at twelve to eighteen year olds. On this site students form and use the formula for direct variation.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Direct and Indirect Variation
A student asks Dr. Math for help to understand the concept of direct and inverse variation. The Dr. begins with the very basics and gives a great discussion on variation. The Dr. includes the thinking process and examples.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Direct and Indirect Variation
Dr. Math addresses the difference between direct and indirect variation. The Dr. gives several examples through his explanation, using real-world scenarios. The Dr. describes how problems are typically stated for indirect variation and...
Free Math Help
Free Math Help: Direct Variation
The discussion examines direct variation. Students learn about the math concept through definitions and sample exercises.
Wolfram Research
Wolfram Math World: Direct Proportion
MathWorld offers a concise mathematical definition of direct variation or direct proportion.
TeachEngineering
Teach Engineering: Forms of Linear Equations
Learners learn about four forms of equations: direct variation, slope-intercept form, standard form and point-slope form. They graph and complete problem sets for each, converting from one form of equation to another, and learning the...
Lawrence Hall of Science
The Math Page: Skill in Algebra: Variation
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...
CK-12 Foundation
Ck 12: Algebra: Inverse Variation Models
[Free Registration/Login may be required to access all resource tools.] Graph, write, and solve inverse variations.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Variations
Twenty-three problems cover a variety of topics applied to variations. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution" button to check...
The Wonder of Science
The Wonder of Science: 3 Ls4 2: Variation, Survival, and Reproduction
Work samples, phenomena, assessment templates, and videos that directly address standard 3-LS4-2: variation, survival, and reproduction
Texas Instruments
Texas Instruments: Direct, Inverse, and Joint Variation
This set of questions pertains to direct, inverse, and joint variation. Students are asked to recognize equations of each type and to solve applications problems. Solutions and explanations are included.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Joint, Direct and Inverse Variation
Twenty-nine problems present a variety of practice working with direct, inverse and joint variation. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the...
University of Regina (Canada)
University of Regina: Math Central: Direct and Partial Variation
Students analyze and explore direct and partial variation. Comprehension is shown through solving real world problems. The two lessons have an overview, materials, procedures, and evaluation techniques.
University of Georgia
University of Georgia: Investigating Direct & Inverse Variation Telescope Act.
A lesson plan to investigate direct and inverse variation through a telescope activity. Good graphical illustrations provided.
CK-12 Foundation
Ck 12: Algebra: Ratio, Proportion, and Variation
[Free Registration/Login may be required to access all resource tools.] Understand direct and inverse variation.
University of Regina (Canada)
University of Regina: Math Central: Direct and Partial Variation
Students analyze and explore direct and partial variation. Comprehension is shown through solving real world problems. The two lessons have an overview, materials, procedures, and evaluation techniques.
Other
Jiskha Math Homework Help: Direct and Indirect Variations
Jiskha.com offers math homework help that provides a general overview of direct and indirect variation, including a few simple graphing examples.
Texas Instruments
Texas Instruments: Direct Variation With Powers: Surface Area and Volume
Students find the approximate surface area and volume of an apple, measuring circumference 3 ways, using the mean of the measurements to find the radius. Each students enters the results in a Table on the board.
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