Write an Equation That Expresses the Relationship $x$ Varies Inversely As $\mathrm { v }$

Multiple Choice

Write an equation that expresses the relationship. Use k as the constant of variation.
- $x$ varies inversely as $\mathrm { v }$ , and $x = 42$ when $\mathrm { v } = 8$ . Find $\mathrm { x }$ when $\mathrm { v } = 48$ .

A) $x = 7$
B) $x = 64$
C) $x = 56$
D) $x = 6$