The direct variation formula is .
(Substitute
)
(Multiply:
)
Apply division property of equality: If a = b then .
(Divide each side by 9)
(Cancel common terms)
(Divide:
)
The direct variation equation is .
Substitute in direct variation equation.
Apply division property of equality: If a = b then .
\
(Divide each side by negative 6)
(Cancel common terms)
(Divide:
)
The value of .