Use the Change-Of-Base Formula to Rewrite the Logarithm as a Ratio

Use the change-of-base formula to rewrite the logarithm as a ratio of logarithms.Then use a graphing utility to graph the ratio.
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F(x) = log_11.7 x
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A) $$f ( x ) = \frac { \log x } { \log 11.7 } = \frac { \ln x } { \ln 11.7 }$$
B) $$f ( x ) = \frac { \log 11.7 } { \log x } = \frac { \ln 11.7 } { \ln x }$$
C) f(x) = log x? + log 11.7 = ln x? + ln 11.7
D) $$f ( x ) = \log \frac { 11.7 } { x } = \ln \frac { 11.7 } { x }$$
E) $$f ( x ) = \log \frac { x } { 11.7 } = \ln \frac { x } { 11.7 }$$ ?