Answer
The function is decreasing from $0$ to $\infty$.
The function is concave down on the interval of $[0;\infty]$
Work Step by Step
The function is decreasing continuously from $0$ to $\infty$.
The function is concave down on the interval of $[0;\infty]$, as the graph forms a letter 'U', which is exactly the form of a concave down function.
