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Chapter 12 – Direct and Inverse Proportions – R S Aggarwal Solutions for class 8

Direct proportions: Two Quantities are said to be in direct proportion if whenever the value of one increases or decreases then the value of other increases or decreases in such a way that ratio between them remains constant.

If two quantities are x and y then x/y remains constant

That is, x1/y1 = x2/y2 = x3/y3 ……. = k

Direct variation or proportion

where k is a constant



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