Question

The value of y is inversely proportional to the value of x. When y=42, x=6.

What is the value of y when x = 9?

Answer 1

Because
`x` and
`y` are inversely proportional, there is some constant
`k` such that


`xy=k`

Given that
`y=42` and
`x=6`, we have


`k=6*42=252`

So when
`x=9`, you have


`9y=252\implies y=\frac{252}9=28`