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If a transformation moves points only up or down, how do the coordinates of the point change? What can you conclude about the coordinate notation for the transformation? The x-coordinate y does not change. The y-coordinate has a positive constant added to it (for a translation up) or a negative constant added to it (translation down). The coordinate notation has the form (x, y) -> (x, -y) , where b is a real number, b # 0