$6)$If the input gear has $30$ teeth and the output gear has $18$ teeth, what is the hunting tooth$$frequency $($as a multiple of running speed$)?$

$$

A$.0\mathrm{.}33$X$$

B$.0\mathrm{.}11$X$$

C$.0\mathrm{.}6$X$$

D$.30$X

$$

The answer A is but can you show me how and in a graph?