By 4000 BCE, many Native American tribes in what is now the Southwestern United States grew less nomadic as they learned to make better use of the dry land on which they lived. How did the ability to irrigate the land lead to the establishment of permanent settlements?​

A=bxh3.2x1.8=5.76 centimeters square

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.