Answer
See below
Work Step by Step
The variables $m$ and $n$ vary, which means $m=\frac{k}{n}\\mn=k$
Given $m=-2\\n=8$
Thus, $k=(-2)8=-16$
Hence, $n=\frac{-16}{m}$
Since $m=5 \rightarrow n=-\frac{16}{5}=-3.2$
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