use the graph to determine a open intervals on which the fun

use the graph to determine 
a. open intervals on which the function is increasing if any 
b. open intervals on which the function is decreasing if any 
c. open intervals on which the function is constant if any

Solution

a) Function is not increasing because there is no upward slope

b) function is decreasing on the interval (2,7)

c) Function is constant on (-3,2)