Question

if X and Y are in direct proportion.then they are known as
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Answer 1

• As we know that if X and Y are in direct proportion.

• Then they are known as directly proportional.

• We know that when two quantities$x$ and $y$are in direct proportion.

• They can be written as $x$∝$y$.

• If two quantities$x$ and $y$are in inverse proportion.

• They can be written as $x$∝1$y$.

Answer 2

if x and y are in direct proportion then they are known as directly proportional

Step-by-step explanation:

if x and y are in direct proportion then they are known as directly proportional

x ∝ y

x = ky

where k is the constant of proportionality or constant of variation.

Additional Info:

Direct variation if a variable increases then other variable also increases with a constant factor   y = kx

inverse variation if a variable increases then other variable decreases with a  constant factor  xy = k

Joint variation is a relationship between atleast three variables, where one variable varies directly with all other variables.

y = kxz

Combined Variation  is a relationship between three or more variables where it is in direct variation with few variable and in inverse  variation with other variable  y = kx/z

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