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You know graphs? Like the thing you learned in elementary school where you had to draw two intersecting lines and then you had to plot many points? That’s that this is about. So suppose you had the graph x=y. This is a 45 degree slope with a positive incline. So if it became -x=y, the slope now has a negative incline. Because of the negative, the graph was rotated by 90 degrees. So what if we could rotate the graph by 30 degrees? 21.84654 degrees? If someone could help me out, please let me know.