Answer
The function is:
Symmetric about the origin.
Decreasing on the interval $(-\infty, \infty)$.
Not increasing on any interval.
Work Step by Step
The picture is provided below.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.