In the waiting room of a vet's office, there are 4 cats, 5 dogs, 1 lizard, and 1 hamster.
n represents the event that a randomly selected animal in this waiting room is a dog.
what is the probability of the complement of event n?
answer with a simplified fraction.

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.