Read a parabola from its graph

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Learn it On a graph, the vertex is the turning point, the zeros are where the parabola crosses the x-axis, and the y-intercept is where it crosses the y-axis. The axis of symmetry passes through the vertex.

Example: A parabola has zeros at −1 and 5.

The axis of symmetry is halfway: x = 2.
The vertex is on that line, at x = 2.

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