Write an Equation That Expresses the Relationship $$\mathrm { y } = 0.2 \text { when } \mathrm { x } = 0.5$$

Multiple Choice

Write an equation that expresses the relationship. Use k as the constant of variation.
- $$\mathrm { y } = 0.2 \text { when } \mathrm { x } = 0.5$$

A) $\mathrm { y } = \frac { 0.1 } { \mathrm { x } }$
B) $y = 0.4 x$
C) $y = 10 x$
D) $\mathrm { y } = \frac { 10 } { \mathrm { x } }$