Answer
Please see the graph.
Work Step by Step
Red line: $y=3^x$
Blue line: $y=log_3 x$
$y=3^x$
$x=3^y$
$log x =y log 3$
$log x/log 3 = y log 3 /log 3$
$log x/log 3 = y$
$log x/log 3$ can also be written as $log_3 x$, so we see that the two functions are inverses of the other function.
$y=3^x$
$x=-1$
$y=3^x$
$y=3^{-1}$
$y=1/3$
$(-1, 1/3)$
$x=0$
$y=3^x$
$y=3^0$
$y=1$
$(0,1)$
$x=1$
$y=3^x$
$y=3^1$
$y=3$
$(1,3)$
The points $(-1, 1/3)$, $(0,1)$, and $(1,3)$ are on the red line, while the points $(1/3, -1)$, $(1,0)$, and $(3,1)$ are on the blue line.
