The graph shows the result of tossing two coins 20 times. The two sides of the coin show heads (H) and tails (T). Based on the result, what is the probability that both coins will show heads the next time the coins are tossed?

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.