Question 1065856
It is basically a cosine function, which needs 2 pi
3 complete functions is 6 pi.  It is half way through its fourth. The graph is radians; 6 pi is nearly 19 radians, and 7 pi is about 22 radians.
A.
{{{graph(300,300,-5,25,-5,5,-3*cos(x))}}}