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No vertical line will intersect the graph in more than one point.

The fundamental flaw is that no graph can show that it does not happen beyond the domain of the graph.

Q: How does the graph show that the quadratic is a function?

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The parabola

The real solutions are the points at which the graph of the function crosses the x-axis. If the graph never crosses the x-axis, then the solutions are imaginary.

No. It can also be a circle, ellipse or hyperbola.

It is the axis of symmetry.

the graph for a quadratic equation ct5r

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the graph of a quadratic function is a parabola. hope this helps xP

The zeros of a quadratic function, if they exist, are the values of the variable at which the graph crosses the horizontal axis.

Yes. And the question is ...

The parabola

Some do and some don't. It's possible but not necessary.

The real solutions are the points at which the graph of the function crosses the x-axis. If the graph never crosses the x-axis, then the solutions are imaginary.

Yes.

That the function is a quadratic expression.

A translation.

When the graph of a quadratic crosses the x-axis twice it means that the quadratic has two real roots. If the graph touches the x-axis at one point the quadratic has 1 repeated root. If the graph does not touch nor cross the x-axis, then the quadratic has no real roots, but it does have 2 complex roots.

No. It can also be a circle, ellipse or hyperbola.

You can easily identify the x-intercepts of a graph of a quadratic function by writing it as two binomial factors! Source: I am in Algebra 2 Honors!