Answer: A. (-∞, -2) ∪ (-1, 0)
B. (2, -1) ∪ (0, ∞)
C. None
Step-by-step explanation:
Let's look at the graph from left to right to see what direction it is going:
- It is increasing (↑) from x = -∞ to x = -2
- It is (↓) decreasing from x = -2 to x = -1
- It is increasing (↑) from x = -1 to x = 0
- It is (↓) decreasing from x = 0 to x = ∞
There are no straight lines so there are no intervals when it is constant.
