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

  • space space space straight x over straight y space remains space constant
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  • xy remains constant


A.

space space space straight x over straight y space remains space constant
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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

84 Views

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

  • space space space straight x over straight y space remains space constant
  • space space space straight x over straight y space remains space constant
  • xy remains constant


C.

xy remains constant

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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:

  • space space space space space space space space space straight X subscript 1 over straight Y subscript 2 equals straight Y subscript 1 over straight Y subscript 2
  • space space space space space space space space space straight X subscript 1 over straight Y subscript 2 equals fraction numerator straight Y subscript 2 over denominator straight Y subscript 2 1 end fraction
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A.

space space space space space space space space space straight X subscript 1 over straight Y subscript 2 equals straight Y subscript 1 over straight Y subscript 2
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