Determine the Constant of Variation for the Stated Condition $y$ Varies Directly As

Multiple Choice

Determine the constant of variation for the stated condition.
-If $y$ varies directly as $x$ , and $y = 300$ when $x = 100$ , find $y$ when $x = 40$ .

A) 120
B) 750
C) $\frac { 40 } { 3 }$
D) $\frac { 3 } { 40 }$