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# What is a direct proportion?

Wiki User

2015-10-26 08:42:44

Two quantities x and y are said to be in direct proportion if whenever the value of x increase (or decrease), then the value of y increases (or decrease) in such a way that the ratio x/y remains constant.

Wiki User

2015-10-26 08:42:44
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Wiki User

2013-03-23 00:17:23
Two variables, X and Y are in direct proportion if Y = kX where k is a constant of proportion.

This requires that if one of x and y is 0, then so is the other, and that for every unit increase in x, y increase by k.