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  • Observe the given table and find which pair of variables (here x and y) are in inverse proportion.

Observe the given table and find which pair of variables (here x and y) are in inverse proportion.

ii)

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Finding if x and y are in inverse proportion:

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

so, calculating xy for each case,

we have,

100\times 60 = 6000            

200\times 30 = 6000

300\times 20 = 6000            

400\times 15 = 6000,

Clearly, xy is equal to a constant value 'k=6000',

Hence, x and y are inversely proportional.

Posted by

Divya Prakash Singh

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