Question

the variables y and x have a proportinal relationship and y=12 when x=5 . what is the value of y when x=8?

Answer 1

y =
`(96)/(5)`

Explanation:

given that y and x are proportional then the equation relating them is

y = kx ← k is the constant of proportionality

to find k use the given condition y = 12 when x = 5

k =
`(y)/(x)` =
`(12)/(5)`

y =
`(12)/(5)` x ← equation of proportionality

when x = 8, then

y =
`(12)/(5)` × 8 =
`(96)/(5)`