Question

Help me find my answer please

Answer 1

y = - 3

Explanation:

Given that y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition that y = - 1 when x = 3, thus

- 1 = 3k ( divide both sides by 3 )

-
`(1)/(3)` = k

y = -
`(1)/(3)` x ← equation of variation

When x = 9, then

y = -
`(1)/(3)` × 9 = - 3

Answer 2

-3

Explanation:

`(-1)/(3) =(-3)/(9)`