The graph of a function f is given. Use the graph to estimate the following. (Enter your answers using interval notation) PLEASE HELP!! confused on whole problem

From the graph
Domain = [ -1 , 4]
Range = [ -1 , 3 ]
b) When you look at the graph, the function f
Increasing = [ -1, 1 ] , [ 2, 4 ]
Decreasing = [ 1 , 2 ]