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.
- $y=5.25$ , when $x=0.24$

A) $y=21.88 x$
B) $y=\frac{1.66}{x}$
C) $y=\frac{1.26}{x}$
D) $y=\frac{21.88}{x}$