There is a curve goes through (-4,1), (-1,3), and (0,0). Estimate the intervals on which the function is increasing or decreasing.

Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: There is a curve goes through (-4,1), (-1,3), and (0,0). Estimate the intervals on which the function is increasing or decreasing.

Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: There is a curve goes through (-4,1), (-1,3), and (0,0). Estimate the intervals on which the function is increasing or decreasing.
