Question 19

When two quantities x and y are in_proportion or vary_, they are written as $x \propto y . .$

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Solution

When two quantities x and y are in direct proportion or vary directly, they are written as $x \propto y .$ [see definition of direct proportion]

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Question 19

When two quantities x and y are in___proportion or vary___, they are written as $x \propto y . .$

Question 20

When two quantities x and y are in ___proportion or vary ___, they are written as $x \propto \frac{1}{y}$ .

Question 43

Two quantities x and y are said to vary directly with each other if for some rational number k, xy =k.

Question 13

If two quantities x and y vary directly with each other, then
(a) $\frac{x}{y}$ remains constant
(b) x-y remains constant
(c) x+y remains constant
(d) $x \times y$ remains constant

Question 43

Two quantities x and y are said to vary directly with each other if for some rational number k, xy =k.

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Constant of Proportionality

Standard IX Mathematics

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Question 19 When two quantities x and y are in___proportion or vary___, they are written as x∝y..

When two quantities x and y are in direct proportion or vary directly, they are written as x∝y. [see definition of direct proportion]

Question 19

When two quantities x and y are in_proportion or vary_, they are written as $x \propto y . .$

When two quantities x and y are in direct proportion or vary directly, they are written as $x \propto y .$ [see definition of direct proportion]