Answer:
[–2, –1.5]
[2, 2.5)
Explanation:
In the figure attached, the points are shown on a coordinate plane. Also, a tentative function was drawn. It was assumed that the function is continuous.
From the picture, decreasing intervals are: [–2, –1.5] and [2, 2.5)
In intervals [–2.5, –2] and [1.5, 2] there is not enough information to know if the function is decreasing or not.