x | y
-∞ | -4
: | -4
-4 | -4
-3 | -4
-2 | -4
-2 | -4 open dot but disregard since coordinate is included above
0 | 0
2 | 4
2 | 4 open dot but disregard since coordinate is included above
3 | 4
4 | 4
: | 4
∞ | 4
I hope the chart above makes sense. If not, plot the points as follows:
- for the top section, (-2, -4), (-3, -4), (-4, -4) ... draw an arrow to -∞
- for the middle section, (-2, -4), (0, 0), (2, 4) then connect them
- for the bottom section, (2, 4), (3, 4), (4, 4) ... draw an arrow to ∞
