The rise on a set of stairs is 6 inches. The tread or the run on the stairs is 9 inches. If the total length of the staircase is 12 feet and the total height is 8
feet, how many steps are needed?

2. root 6 is the right answer

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.