As per the direct variation formula, direct variation exists between any two variables when one quantity is directly dependent on the other i.e. if one quantity increases with respect to the other quantity and vice versa. It is the relationship between two variables where one of the variables is a constant multiple of the other. Since the two variables are directly related to each other it is also termed as directly proportional. Thus, the ratio of these two variables is always a constant number. Let's look into the mathematical representation of the direct variation formula.
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