$\"\"$

Let $\"\"$ , and Find the $\"\"$ .

Method 1: Using the product rule.

Product rule for inverse variations: $\"\"$ .

$\"\"$ (Substitute $\"\"$ )

$\"\"$

$\"\"$ (Multiply each side by negative one)

$\"\"$

Method 2: Using the proportion rule.

proportion rule for inverse variations: $\"\"$ .

$\"\"$ (Substitute $\"\"$ ) $\"\"$

Apply cross product property: $\"\"$ .

$\"\"$

$\"\"$ $\"\"$ (Multiply each side by negative one) $\"\"$

The value of $\"\"$ .