It is the bisector of any 2 parallel chords drawn to the parabola. It is always parallel to the axis of the parabola.
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A parabola opening up has a minimum, while a parabola opening down has a maximum.
All of the points on a parabola define a parabola. However, the vertex is the point in which the y value is only used for one point on the parabola.
A parabola's maximum or minimum is its vertex.
A parabola has a minimum value when it looks like the letter U
To have a parabola with only one x-intercept, the vertex of the parabola must lie on the x-axis. This means the parabola opens either upwards or downwards, depending on the coefficient of the squared term in the equation. If the coefficient is positive, the parabola opens upwards, and if it is negative, the parabola opens downwards. By adjusting the coefficients in the equation of the parabola, you can position the vertex such that there is only one x-intercept.