If y is directly proportional to x thenA- y-x- constantB- x - y - constantC- x-y- constantD- x-y- constant

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Standard IX

Mathematics

Direct Proportionality

If y is direc...

Question

If $y$ is directly proportional to $x$ then

\frac{y}{x} = c o n s t a n t

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x \times y = c o n s t a n t

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x + y = c o n s t a n t

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x - y = c o n s t a n t

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Solution

The correct option is A $\frac{y}{x} = c o n s t a n t$
If two quantities are in direct proportion then, ratio of those quantities will be a constant.
Hence, $\frac{y}{x} = c o n s t a n t$

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If y is directly proportional to x then

The correct option is A yx=constantIf two quantities are in direct proportion then, ratio of those quantities will be a constant. Hence, yx=constant

If $y$ is directly proportional to $x$ then

The correct option is A $\frac{y}{x} = c o n s t a n t$
If two quantities are in direct proportion then, ratio of those quantities will be a constant.
Hence, $\frac{y}{x} = c o n s t a n t$