Press space to hide/show the variables The a value determines how stretched or shrunk the parabola is. You may want to enter a number smaller than 1 or 0.1 to get a somewhat wide parabola. The H and K values determine the position (of the vertex) of the parabola. K is the Y position, and H is the X position. Note that H is always negative, so if you enter a positive number the parabola will shift to the left and vice versa. The quality (q) is how accurately the parabola is drawn. Higher numbers result in less quality and smaller numbers are higher quality. Higher q values take less time to draw. If you want a parabola that takes the entire screen try this: a=0.0063 h=0 k=-180 q=2
