Answer:
[1, 2.5]
Step-by-step explanation:
A rate of change ┬аon x- axis is defined as positive if the function increases as x does, and defined negative if y decreases as x increases.
Thus, we only need to see in which of those intervals [тАУ2, тАУ1] , ┬а[тАУ1.5, 0], ┬а[0, 1]. [1, 2.5] the graph of the function goes only down if we look it from left to right.
The only one interval satisfying this condition is [1, 2.5].
