Express Using Positive Exponents $$\left( \frac { 1 } { 3 } \right) ^ { - 2 }$$

Multiple Choice

Express using positive exponents. Then simplify.
- $$\left( \frac { 1 } { 3 } \right) ^ { - 2 }$$

A) $\frac { 1 } { 6 }$
B) 9
C) $\frac { 1 } { 9 }$
D) $- 9$