### Home > CALC > Chapter 4 > Lesson 4.2.4 > Problem 4-91

4-91.

*Without your calculator*, describe the graph of . A complete answer states where

*is increasing, decreasing, concave up, concave down, and points of inflection.*

When ,

*is increasing. When*

*,*

*is decreasing. An inflection point occurs when*

*. When*

*, the function is concave up. When*

*, the function is concave down.*