Determine the Constant of Variation for the Stated Condition $y = 5$

Multiple Choice

Determine the constant of variation for the stated condition.
- $y = 5$ when $x = 15$

A) $y = \frac { 1 } { 3 } x$
B) $y = 3 x$
C) $\mathrm { y } = \mathrm { x } + 10$
D) $y = \frac { 1 } { 5 } x$