Find an Equation of Variation in Which Y Varies Inversely $y = 21$

Multiple Choice

Find an equation of variation in which y varies inversely as x and the following is true.
- $y = 21$ , when $x = 48$

A) $\mathrm { y } = \frac { 0.44 } { \mathrm { x } }$
B) $y = 1008 x$
C) $\mathrm { y } = 0.44 \mathrm { x }$
D) $\mathrm { y } = \frac { 1008 } { \mathrm { x } }$