Algebra Simplified - Variation:Direct , Inverse, Joint, and Combined Variation

This video is part of Professor Farzin's Algebra Simplified Series. Its aim is to teach the viewer about the various types of mathematical variation. We will learn about the following types of variation:
Direct Variation
Inverse Variation
Joint Variation
Combined Variation
We will handle every single example using 2 methods:
1. Working with the Variation Equation by first finding the Variation Constant.
2. Working directly with the Variation Proportion, and thereby bypassing the need to find the Variation Constant.