You can put this solution on YOUR website! The period is 4 units (presumably radians)--measure it from one specific part of the curve to the next time that spot is seen.
The range is 3-(-1), or 4, between (-1 and 3) or [-1, 3], the y-value
each cycle is 4 radians, so 20 cycles or 80 radians is the time until it fades
the equation of the axis isn't clear. The function can be described as
2 cos (Pi*x/2)+1
the amplitude is 2 (from the base point to the max or min)
