Find the Function Value $g ( x ) = \left( \frac { 1 } { 3 } \right) ^ { x }$

Multiple Choice

Find the function value. If the result is irrational, round your answer to the nearest thousandth.
-Let $g ( x ) = \left( \frac { 1 } { 3 } \right) ^ { x }$ . Find $g ( 4.5 )$ .

A) $0.007$
B) $140.296$
C) $- 13.5$
D) $0.014$