Answer
$ a.\quad (-\infty,6)$
$ b.\quad (-\infty,1)$
$c.\quad -1$
$d.\quad-6$ and $6.$
Work Step by Step
$ a.\quad$
The arrow to the left means that the graph extends to $-\infty$.
The solid dot at $(6,-3)$ means that $f(x)$ is not defined beyond x=5.
Domain = $(-\infty,6)$
$ b.\quad$
The arrow on the left side of thegraph indicates that function values plummet towards $-\infty.$
The function values do not go beyond $y=1.$
Range = $(-\infty,1)$
$c.\quad $
The point $(-4,-1)$ is on the graph. So, $f(-4)=-1$
$d.\quad 2$
Points $(-6,-3)$ and $(6,-3)$ are on the graph.
So, such values for x are $-6$ and $6.$
