As x →∞, they-values keep going down.
As x →∞, y→−∞
As x →−∞, do the y-values go up, down, or do they level off to a horizontal asymptote?
Follow the curve towards x = 0 from the left of that point. What y-value do you predict?
Use the eTool below to view the graphs of the parts.
Click the link at right for the full version of the eTool: Calc 1-57 HW eTool