Write an Equation That Expresses the Relationship $y = 4$ When $x = \frac { 1 } { 2 }$

Multiple Choice

Write an equation that expresses the relationship. Use k as the constant of variation.
- $y = 4$ when $x = \frac { 1 } { 2 }$

A) $y = \frac { 2 } { x }$
B) $y = 8 x$
C) $y = \frac { x } { 2 }$
D) $\mathrm { y } = \frac { 1 } { 2 \mathrm { x } }$