How to Graph a Horizontal Parabola
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How to Graph a Vertical Parabola

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Square the variables in the equation of the parabola.

The squaring of the variables in the equation of the parabola determines where it opens: When the x is squared and y is not, the axis of symmetry is vertical and the parabola opens up or down. For instance, y = x2 is a vertical parabola; its graph is shown.

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