sorry it took a bit to get back to ya. i'll try to answer everything you wrote above.
x<2: unshaded circle, and goes into negatives (because x is less than 2)
<◘◘◘◘◘◘◘◘◘◘o------------------>
...-1...0...1...2...3...4...5............
x>3 (has a line under >): shaded circle
<---------------•◘◘◘◘◘◘◘◘◘◘◘◘◘>
...-1...0...1...2...3...4...5............
4<x: unshaded circle
<------------------o◘◘◘◘◘◘◘◘◘◘>
...-1...0...1...2...3...4...5............
-1>x (has a line under >): shaded circle
<◘◘•--------------------------->
...-1...0...1...2...3...4...5............
And for your last question on first post:
x>-3: unshaded
<-----------------------o◘◘◘◘◘◘◘>
...-8...-7...-6...-5...-4...-3...-2......
x<-3: unshaded
<◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘◘o-------->
...-8...-7...-6...-5...-4...-3...-2......
Hope that helps
