Use the given graph to answer following questions
http://i.imgur.com/3ilrkeu.png?
1. What are the open intervals when f is concave upwards?
2. What are the open intervals when f is concave downwards?
3. What are the coordinates of the inflection points?

Question

anonymous · Answer

there is no way to see it but to see it

anonymous · Answer

|dw:1446784986303:dw|

anonymous · Answer

always thought the up/down bit kind of silly
imagine you are riding a bike going from left to right on the curve
if you are leaning to the left, then it is concave up
if you are leaning to the right it is concave down