Question 20

When two quantities x and y are in _proportion or vary _, they are written as $x \propto \frac{1}{y}$ .

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Solution

When two quantities x and y are in inverse proportion or vary inversely, they are written as $x \propto \frac{1}{y}$ .

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Question 19

When two quantities x and y are in___proportion or vary___, they are written as $x \propto y . .$

Question 19

When two quantities x and y are in___proportion or vary___, they are written as $x \propto y . .$

Two quantities x and y are said to vary in inverse proportion, if there exists a relation of the type xy = k between them, k being a constant.

Question 43

Two quantities x and y are said to vary directly with each other if for some rational number k, xy =k.

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