Question

Please help me solve the problem

Answer 1

y = -
`(3)/(2)` x

Explanation:

Given that x and y vary directly then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition x = - 4, y = 6, thus

6 = - 4k ( divide both sides by - 4)

`(6)/(-4)` = k, or k = -
`(3)/(2)`

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