From Förberedande kurs i matematik 1
The curve y=x2 is a parabola with a minimum at the origin according to the figure below on the left and, compared with that curve, y=x2+1
is the same curve but with the number 1 added to the y-coordinate of each point, i.e. the parabola is shifted one unit up in the y-direction.
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| The graph of f(x) = x²
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| The graph of f(x) = x² + 1
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