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Direct and Inverse Proportions

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Class 10 Class 12

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

91 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

123 Views

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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#6 {main}</pre>

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
87 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
  • <pre>uncaught exception: <b>mkdir(): Permission denied (errno: 2) in /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php at line #56mkdir(): Permission denied</b><br /><br />in file: /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php line 56<br />#0 [internal function]: _hx_error_handler(2, 'mkdir(): Permis...', '/home/config_ad...', 56, Array)
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#6 {main}</pre>
  • xy remains constant


A.

space space space straight x over straight y space remains space constant
161 Views

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