There were 13 children at a party. Each boy was given 3 balloons and each girl was given 6 balloons. 63 balloons were given out altogether. How many boys and girls were there?

The answer would be (c)

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.