Problem # 5: Netflix charges $7.99 a month for unlimited movies. Redbox charges $1.50
per movie per day. Assume that you will be renting each movie for
one day from the Redbox, how many movies must you rent for the month to save
money using Netflix?

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.