Use the fact that [math]y = \log_b x[/math] is the inverse of [math]y=b^x[/math], and your knowledge of the graphs of functions and their inverses, to show the correct graph of [math]y = \log_b x[/math]. Note that the graph will look different depending on whether [math]b>1[/math] or [math]0<b<1[/math].