Which expression is equivalent to −1.3+(−4.9)+(−2.6) ? −(1.3−4.9)+(−2.6)

−1.3+(4.9+2.6)

−1.3−(4.9+2.6)

(1.3+4.9+2.6)

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.