Lost in Translation
x > 9
open circle at 9, pointing right
x ≤ 17
closed circle at 17, pointing left
x -12 < -4
x < 8, closed circle at 8, pointing left
-8x > 32
x < -4, open circle at -4, pointing left
1/2x ≥ 4
x ≥ 8, closed circle pointing right