Ennifer has as many pictures on her camera as luisa does. jennifer has 28 pictures on her camera. how
many pictures do jennifer and luisa have in all?

28 + 28 = 56 pictures have Jennifer and Louisa in all.

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.