Use the graph of f to find

Question

use the link for the graph 

 

 

http://www.webassign.net/waplots/8/b/b33c075a76a0436c6fb60a67a91a67.gif

 

a) Find the largest open interval(s) on which f is increasing. (Enter your answer as a comma-separated list of intervals).

b) Find the largest open interval on which f is decreasing.

Answer 1

a)

 

Largest open intervals of increase is where the graph covers more intervals in its domain, or slow increases.  This slowest increase occurs in the interval (6, 7) and (7, 8).

 

 

b)

 

Same concept as part a).   Interval in (-3, 1).