Write in Logarithmic Form $$9 ^ { 7 x } = y$$

Multiple Choice

Write in logarithmic form.
- $$9 ^ { 7 x } = y$$

A) $\log _ { 9 } 7 x = y$
B) $\log _ { y } 7 x = 9$
C) $\log _ { 9 } y = 7 x$
D) $\log _ { y } 9 = 7 x$