Thank you for the opportunity to help you with your question!

A function is increasing in an interval when it is going up left to
right in that interval. With that in mind, what interval, if any,
is this function increasing?

so

a. (0,-1) to (2,2)

A function is decreasing in an interval when it is going down left
to right in that interval. With that in mind, what interval, if
any,
is this function decreasing?

so

b. (-1,3) to (0,-1)

Please let me know if you need any clarification. I'm always happy to answer your questions.