Question

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

Answer 1

y varies inversely with x

then

$\begin{gathered} y=\frac{k}{x} \\ -1=\frac{k}{8} \\ k=-1\cdot8 \\ k=-8 \end{gathered}$

so,

$n=-\frac{8}{4}=-2$

answer: n = - 2