Question

An inverse variation includes the points (8, -1) and (4, n). Find n.

Answer 1

y varies inversely with x

then

`\begin{gathered} y=(k)/(x) \\ -1=(k)/(8) \\ k=-1\cdot8 \\ k=-8 \end{gathered}`

so,

`n=-(8)/(4)=-2`

answer: n = - 2