If Y Varies Directly as X, Find a Linear Function $$y = 2 \text { when } x = \frac { 1 } { 9 }$$

Multiple Choice

If y varies directly as x, find a linear function which relates them.
- $$y = 2 \text { when } x = \frac { 1 } { 9 }$$

A) $f ( x ) = \frac { x } { 18 }$
B) $f ( x ) = \frac { x } { 2 }$
C) $f ( x ) = 18 x$
D) $f ( x ) = x + \frac { 17 } { 9 }$