Answer
The function is decreasing on the inerval $[-\infty;c]$ and increasing on the interval of $[c;\infty]$.
The function is concave down on the interval of $[-\infty;\infty]$
Work Step by Step
The function is decreasing on the inerval $[-\infty;c]$ and increasing on the interval of $[c;\infty]$.
The function is concave down on the interval of $[-\infty;\infty]$, as the graph forms a letter 'U', which is exactly the form of a concave down function.
