Question

Y varies inversely as x. y=12 when x=7. Find y when x=2

Answer 1

We write as an inverse proportion first then make an equation by multiplying by k:

`y=(k)/(x)\Rightarrow k=x* y`

Find the value of k:

`k=7*12=84`

Then, when x = 2, y is:

`y=(84)/(2)=42`

Answer: y = 42