Answer:
-1.9
Explanation:
Notice that the point is on the left of -1.5, it has to be less than -1.5. The only numbers smaller than -1.5 that are give are either -4, or -1.9. Since the point "B" is not that far away from -1.5, it can't have the value of -4, thus the answer is -1.9.
Hope this helps, Good Luck!