$g$ is an exponential function of the form $g(x)=a\cdot r^x$ $(r>0)$. The table below lists a few values of $g$.
**What is the common ratio $r$ of the function $g\ $**?
$r=$ [[☃ numeric-input 1]]
$x$ | $g(x)$
- | - | -
$1$| $-96$
$3$ | $-24$
$6$ | $-3$