What are some real-world examples of direct variations?

Answer

Direct variation is where the ratio of two quantities is constant. If the ratio of two variables does not change, these two are then related by direct variation. Real world examples include a worker taking longer hours on job because he/she is paid by the hour so as to get more money, so here the pay and hours worked are in direct variation
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Speed and distance: the faster you go, the further you can go in a fixed amount of time.
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It's direct RELATION. Like two variables are directly related. One is the teen birth rate and murder. As teen birth rate in a given area increases, the murder rates in the same area
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Zillions. Any game with asymmetric information. (Not just e.g. poker, but things like chess games between unskilled players—if you can fool someone into pursuing an early checkmate
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