In the region `x < -2`, the function is defined as:
`y = -2x - 8`
As x gets closer to `-2` from the left side, we can see that the value of the function gets closer to `-4`.
Now for the region `x > -2`. The function on this side is defined as
`y = 3x + 2`
As x approaches `-2` from the right, we see that the function value also approaches `-4`.
The function is not defined at `x = -2` so it is not continuous there. We represent this with an open circle on the graph.
Graph of a split function.
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