Answer:
Step-by-step explanation:
Start with cos (x)
it goes from .4 to 9.8 for a 'height' of 9.4
then amplitude = 1/2 height = 4.7
so far: 4.7 cos x
then it is shifted to the RIGHT by 0.4 :
4.7 cos ( x - 0.4)
the period is usually 2 pi ....this one is stretched from
0.4 to 9.9 or 9.5 units
4.7 cos{ 2 pi / 9.5 (x - 0.4) }
FINALLY it is shifted UP to a midline of 5.1
4.7 cos (2pi/9.5 (x- 0.4)) + 5.1
