(Brainliest) Find the equation of the graph, at what values of x does the graph reach its maximum values, on what intervals is the graph increasing, is this function odd or even or neither.

Step-by-step explanation:

The max value that this function reaches is 6, and the function reaches this value repeatedly, beginning at x = 0 and then at x = 6, 12, 15, etc.  This tells us that the period of the function is 6.  

The function is increasing on (3, 6), (9, 12), and so on

The function is even because the graph is symmetrical about the y-axis.