A quadratic function is a function of the form y=ax^2+bx+c, where a, b, and c are some numbers, and a is not zero.
The graph of the quadratic function is a parabola.
When increasing the coefficient a the graph is as «compressed», when negative a parabola is turned “upside down”, when changing the coefficient b the graph is «deviated» to the side, and when changing the coefficient c the graph «runs» up and down.
Example quadratic function graph:
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