The solution set of the system y1 = 2x + 3 and y2 = -x + 9 is {(2, 7)}. Using slopes and y-intercepts, determine which of the two calculator-generated screens, left or right, is the appropriate one for this system.

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.