PQ ⊥ PS start overline, P, Q, end overline, \perp, start overline, P, S, end overline m ∠ Q P R = 7 x − 9 ∘ m∠QPR=7x−9 ∘ m, angle, Q, P, R, equals, 7, x, minus, 9, degrees m ∠ R P S = 4 x + 2 2 ∘ m∠RPS=4x+22 ∘ m, angle, R, P, S, equals, 4, x, plus, 22, degrees Find m ∠ Q P R m∠QPRm, angle, Q, P, R:

Two because two of one thing is two.

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.