Sixty eight is one fourth of what number

You would have to multiply by the reciprocal so 68 times 4 is 272. Therefore, one forth of 272 is 68. 

The answer is 272. 

68 times 4 equals 272. 
or if you did 272 divided by 4 you would get 68. 

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.