$(1$ point$)$ Consider $y=\frac{4}{x-9}$ for $x9.$ Determine where $yis$ increasing, decreasing, concave

$up,$ and concave down. Enter your answers using interval notation.

$yis$ increasing $on$

$yis$ decreasing $on$

$yis$ concave $upon$

$yis$ concave down $on$

Use your answers above $to$ sketch a graph $ofy.$