Find the Domain of the Square Root Function $$f ( x ) = \sqrt { 64 - 8 x }$$

Multiple Choice

Find the domain of the square root function. Then use the domain to choose the correct graph of the function.
- $$f ( x ) = \sqrt { 64 - 8 x }$$

A) domain of $f : [ 8 , \infty )$

B) domain of $\mathrm { f } : [ - 8 , \infty )$

C) domain of $f : ( \infty , - 8 ]$

D) domain of $\mathrm { f } : ( \infty , 8 ]$