[tex]y = \frac{3^{x}}{9}[/tex]
[tex]x = \frac{3^{y}}{9}[/tex] (Interchange the x-values and the y-values)
Now, solve for y.
[tex]9x = 3^{y}[/tex]
[tex]y = log_3 (9x)[/tex]
[tex]y = log_3(9) + log_3(x)[/tex]
[tex]y = 2log_3{3} + log_3(x)[/tex]
[tex]y = \frac{ln(x) + 2ln(3)}{ln(3)}[/tex]
