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When two variables are related in such a way that the ratio of their values always remains the same, the two variables are said to be in direct variation.
In general, we say, that varies directly as if there is a constant k so that the equation is true.
The of a line is the constant of variation. becomes . The constant of variation is , but NO, is not a variation because the equation cannot be written in the form of .
if only , would be a variation, since it has added to , it's variation