Janine is randomly arranging four different logo items in a row in the school store window: ear buds, sunglasses, water bottles, and baseball caps. What is the probability that she places the sunglasses and the baseball hat in first and second?

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.