Precalculus Examples

$| y | = x + 2$

Step 1

Rewrite the equation as $x + 2 = | y |$ .

$x + 2 = | y |$

Step 2

Subtract $2$ from both sides of the equation.

$x = | y | - 2$

Step 3

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

$f (y) = | y | - 2$