# Math Help - graphical log question

1. ## graphical log question

if the graph of a function of y=log_a (x) goes through (22,1) then what does a =?

Solve $1 = \log_a (22)$ for $a$.
Here is the first and last step: $a^1 = 22$.
change $y = \log_a(x)$ to an exponential equation ... then sub in the given values.