Answer: {-2, -0.5, -1.5, 0}
Explanation:
The key things we need to recognize is that we are extracting the numbers covered by the red line. This line does not include all values from -2 to 4, though. The white dot means that part of the inequality is x < 4.
Therefore, the answer is every number that fits in the equality:
This includes -2 and every number up to 4, but NOT 4.
I hope this helps, if you need anything explained let me know.