Direct Variation - Concept

Concept Concept (1)

We often use the term direct variation to describe a form of dependence of one variable on another. An equation that makes a line and crosses the origin is a form of direct variation, where the magnitude of x increases or decreases directly as y increases or decreases. Direct variation and inverse variation are used often in science when modeling activity, such as speed or velocity.

Sample Sample Problems (5)

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Direct Variation - Problem 1

y varies directly as the cube of x.

If y = 32 when x = 2, find y when x = 3.
Problem 1
How to solve a direct variation problem using variables.
Direct Variation - Problem 3
Problem 3
Solving direct variation word problems using the relation y = kx.
Direct Variation - Problem 4
Problem 4
Writing equations to model direct variation relationships
Direct Variation - Problem 5
Problem 5
Determining whether or not a relation represents direct variation