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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.

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โˆ™ 2015-10-26 08:42:44
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โˆ™ 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.

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Q: What is a direct proportion?
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Differentiate direct proportion from inverse proportion?

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== ==


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What is the direct proportion?

Two variables, X and Y, are said to be in direct proportion if X/Y is a constant. Equivalently, Y = cX for some constant c.


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Is expenditure and number of family members direct or inverse proportion?

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