How to use proportions for direct variation to solve for x

The video tutorial explains the concept of direct variation, where Y varies directly with X. It demonstrates how to solve for X when Y is given, using the principle that the ratio of Y to X is constant. The tutorial walks through setting up equations, equating ratios, and applying cross multiplication to find the solution. The process is illustrated with an example where Y is 4 when X is -2, and the task is to find X when Y is 6. The solution involves setting up the equation, applying cross multiplication, and solving for X, resulting in X being -3.

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