The image of trapezoid PQRS after a reflection across WY is a trapezoid P'QʻR’S. Which of the following statements are true?
A. SS - 2 SX
B. RR' = 2 SS'
C. RR' = 4 SS"
D. RZ. RZ
E. RR” ISS
F. RR 155
G. WY 15
H. MXYZR 90°

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.