Explanation:
10.
-2 < 6x - 2 < 46
0 < 6x < 48
0 < x < 8
so the line goes (with empty dots because of "<") from 0 to 8.
11.
4 + 9r <= 58 or 7r - 3 >= 46
9r <= 54 or 7r >= 49
r <= 6 or r >= 7
the line goes (with filled dots because of ">=" and "<=") from 6 all the way to the left, and from 7 all the way to the right.
12.
filled dot at -4, empty dot at +3.
connecting line between both dots.
-4 <= x < 3
13.
filled dots at -1 and at +6.
lines going away left and right.
x <= -1 or x >= 6
14.
empty dots at +3 and +4.
lines going away left and right.
x < 3 or x > 4
15.
filled dot at +6, empty dot at +8.
connecting line between both dots.
6 <= x < 8