Answer
$-7\lt c$
Work Step by Step
$2\lt9+c\longrightarrow$ subtract 9 from each side
$2-9\lt9+c-9\longrightarrow$ subtract
$-7\lt c$
Check the inequality.
$2\overset?\lt9+0$
$2\lt9\checkmark$
Since -7 is not included in the solution, the endpoint of the graph is an open circle.
