College Algebra / Unit 7 Alg 391 short lesson, about 20 seconds
Direct Variation
Captions available
The idea
Two quantities vary directly when y = kx for a nonzero constant of variation k — doubling one doubles the other.
In practice
Wages vary directly with hours worked: 12 dollars for 4 hours fixes the rate k = 3, so 10 hours pays 30 dollars.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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