Direct proportion means that when one thing goes up, the other thing goes up too, and when one thing goes down, the other thing goes down. For example, in Charles' Law, if the temperature of a gas increases, the volume of the gas also increases, as long as the pressure stays the same. They change together!
The two variables in Charles’ Law are in direct proportion. Explain what direct proportion means. simple short. 4th grade
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1 answer