Find the Domain of the Given Function $$f ( x ) = \sqrt { 3.5 x + 3 }$$

Find the domain of the given function.
- $$f ( x ) = \sqrt { 3.5 x + 3 }$$

A) all real numbers $x$ where $x > -$
B) all real numbers $x$ where $x > - \frac { 3 } { 35 }$
C) all real numbers $x$ where $x \geq -$
D) all real numbers $x$ where $x \geq - \frac { 6 } { 7 }$