Use the given graph of the function to answer the following questions. If a question has two or more answers separate them with commas.
1. On what
open interval or union of open intervals is is concave upward? For credit your interval(s) must be as large as possible.
Answer (in
interval notation):
2. On what open interval or union of open intervals is is concave downward? For credit your interval(s) must be as large as possible.
Answer (in interval notation):
3. List the points of inflection. List your answers as points in the form .
Answer (separate by commas):
Note: You can click on the graph to enlarge the image.
You can earn partial credit on this problem.