From Wikimedia Commons, the free media repository
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Quadratic function, y = x 2
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svg: Quadratic function, y = x², parabola.
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Parabola stencil with mathematic parabola functions
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svg: Square and square-root function graph, if possible use this instead of the next two versions!
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jpg: Square and square-root function graph, highres JPEG.
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[edit] used in