Question

What is the formula for direct and inverse variation?

Answer 1

The formula for direct variation is y = k × x and the formula for inverse variation is y = k/x

The direct variation represented by the equation

y ∝ x

Its is y directly proportional to x

Where x is the independent variable

y is the dependent variable

By replacing the ∝ sign with the equal sign. The equation will be

y = kx

Where k is the constant of proportionality

Similarly the  inverse variation is

y ∝ 1/x

Replace the ∝ sign with the equal sign

y = k/x

Therefore, the direction variation represented by y = k × x and inverse variation represented by y = k/x

Learn more about direct variation here

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