Betty and her neighbor are both hanging strands of christmas lights that have 1000 lights on each strand. Bettys neighbor hangs 3 more than twice as many strands as betty. Betty hung 8 fewer strands than her neighbor.

The solution to the system of equations (-2,2)

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.