Use a Graphing Utility to Graph the Function and Visually

Use a graphing utility to graph the function and visually determine the intervals over which the function is increasing, decreasing, or constant. ​ ​

A) ​increasing on (-∞, ∞)
B) descreasing on (-∞, 1) increasing on (1, ∞)
C) ​increasing on (-∞, 1) descreasing on (1, ∞)
D) ​descreasing on (-∞, ∞)
E) descreasing on (1, 1) increasing on (1, ∞)