$\"\"$

The direct variation formula is $\"\"$ .

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

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ (Divide each side by 9.9)

$\"\"$ (Cancel common terms)

$\"\"$ (Divide: $\"\"$ ) \ \

The direct variation equation is $\"\"$ . $\"\"$ $\"\"$ (Substitute $\"\"$ )

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ (Divide: $\"\"$ ) $\"\"$

The value of $\"\"$ .