Determine the Constant of Variation for the Stated Condition $c$ Varies Jointly as a And

Multiple Choice

Determine the constant of variation for the stated condition.
- $c$ varies jointly as a and $b$ , and $c = 108$ when $a = 60$ , and $b = 45$ .

A) $\mathrm { k } = \frac { 1 } { 25 }$
B) $\mathrm { k } = \frac { 1 } { 45 }$
C) $k = 25$
D) $\mathrm { k } = 45$