Find an Equation of Variation in Which $y$ Varies Inversely As $x$

Multiple Choice

Find an equation of variation in which $y$ varies inversely as $x$ and the following is true.
- $y=0.625$ , when $x=8$

A) $y=5 x$
B) $y=\frac{5}{x}$
C) $y=\frac{8}{x}$
D) $y=\frac{6}{x}$