Q. 134.5( 2 Votes )

# If two quantities and x and y vary directly with each other, thenA. remains constant.B. x – y remains constant.C. x + y remains constant.D. x × y remains constant.

If two quantities x and y vary directly with each other, then .

Since, in direct proportion, both x and y increases or decreases together such a manner that the ratio of their corresponding value remains constant.

Hence, option (a) is correct

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