Katie's swim team is having an end of season plaza party. When the party started, there were 50 slices of pizza. Now there are 20 slices left. Which of the following show(s) how much of the plaza has been eaten?

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.