Write as a Function of x x^3y=-4

$x^{3} y = - 4$

Divide each term in $x^{3} y = - 4$ by $x^{3}$ and simplify.

Divide each term in $x^{3} y = - 4$ by $x^{3}$ .

$\frac{x^{3} y}{x^{3}} = \frac{- 4}{x^{3}}$

Simplify the left side.

Cancel the common factor of $x^{3}$ .

Cancel the common factor.

$\frac{x^{3} y}{x^{3}} = \frac{- 4}{x^{3}}$

Divide $y$ by $1$ .

$y = \frac{- 4}{x^{3}}$

Simplify the right side.

Move the negative in front of the fraction.

$y = - \frac{4}{x^{3}}$

To rewrite as a function of $x$ , write the equation so that $y$ is by itself on one side of the equal sign and an expression involving only $x$ is on the other side.

$f (x) = - \frac{4}{x^{3}}$

Write as a Function of x x^3y=-4

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