Which Is a Logarithmic Function?
A) $h ( x ) = \sqrt { 20 x + 12 }$

Multiple Choice

Which is a logarithmic function?

A) $h ( x ) = \sqrt { 20 x + 12 }$
B) $g ( x ) = \log _ { 20 } x$
C) $f ( x ) = 20 ^ { x + 2 }$
D) $k ( x ) = \frac { 5 x } { x - 20 }$