Answer:
C
Step-by-step explanation:
For a graph to be increasing on an interval, its slope must be increasing. It doesn't necessarily even need to be positive, but its slope must be getting steeper and steeper. You can use your hand to model the straight line slope at each point.
In this case, C is the right answer because the slopes in the second quadrant (-infinity to 0) are steadily increasing from nearly horizontal to nearly vertical. The slopes in the first quadrant (0 to infinity) are steadily decreasing.
Why not A: It's decreasing initially, then increasing.
Why not B: It's decreasing initially. The value starts negative and gets more negative in the second quadrant.
Why not D: The slope is the same in each quadrant. It doesn't increase or decrease.
