1. The problem statement, all variables and given/known data Im doing a question where I have to graphc y = -4 sin x Ok well I got the period and amplitude, so I have the interval of [0, 2pi] Now, in order to plot points, I have to divide the interval into 4 sub intervals. I dont understand how I do that! This is where I get stuck, and dont know how to plot the points now. Any help would be great! 2. Relevant equations 3. The attempt at a solution In my book it says " We divide the interval [0, 2pi] into 4 sub intervals, each of length 2pi/4 = pi/2 I dont get that.