HELPP !! Pls I really need help with this I’m Not good at this and I might be easy but for me no lol I really just don’t understand :( could anyone please try to help me :( ??

Ithink if im not mistaking b is -3 but im not a 100% sude

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.