Write the Statement as a Power Function Equation $c = \frac { w } { k }$

Multiple Choice

Write the statement as a power function equation. Use k as the constant of variation.
-The cost c of a turkey varies directly as its weight w.

A) $c = \frac { w } { k }$
B) $\mathrm { c } = \mathrm { kw } ^ { 2 }$
C) $\mathrm { c } = \frac { \mathrm { k } } { \mathrm { w } }$
D) $\mathrm { c } = \mathrm { kw }$