Brain irons 2/9 of his shirt in 3 3/5 minutes . Brain irons at a constant rate . At this rate, how much of his shirt does he iron each minute?

You can use a calculater and divide the minutes by the $$, hope that you

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.