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### Course: Algebra (all content) > Unit 13

Lesson 7: Direct and inverse variation- Intro to direct & inverse variation
- Recognizing direct & inverse variation
- Recognize direct & inverse variation
- Recognizing direct & inverse variation: table
- Direct variation word problem: filling gas
- Direct variation word problem: space travel
- Inverse variation word problem: string vibration
- Proportionality constant for direct variation

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# Inverse variation word problem: string vibration

Sal models a context about lengths of strings and the frequency of their vibrations! with an inverse variation equation. Created by Sal Khan and Monterey Institute for Technology and Education.

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