﻿ In a direct proportion, two quantities x and y vary with each other such that: from Mathematics Direct and Inverse Proportions Class 8 Manipur Board

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Direct and Inverse Proportions

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# In a direct proportion, two quantities x and y vary with each other such that: xy remains constant

C.

xy remains constant

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If the following quantities vary directly, then what is the value of y?

 y 5 8 20
• y = 20

• y = 2

• y = 4

B.

y = 2

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If the following quantities vary directly, then what is the value of x?

 1 4 7 x
• x = 4

•  x = 7

• x = 28

A.

x = 4

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In a direct proportion, two quantities x and y vary with each other such that:

• xy remains constant

A.

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Let there be two values of x be x1 and x2 such that two values of y as y1 and y2 respectively equal to x1 and x2, then x and y are said to vary in inverse proportion, if:

A.

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