Algebra 1 · Linear Functions
Direct Variation
Algebra 1 · Linear Functions
Definition
Direct variation is a relationship y = kx where y is a constant multiple k of x, graphing through the origin.
Examples
- y = 3x is direct variation through the origin.
- y = 0.5x is direct variation.
Key rule
A direct variation always passes through (0, 0).
Memory hook
Direct variation - straight through the origin.