Graphing Quadratics - English

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Outline:
Graphing Quadratics

Open the simulation in HTML file format.
About PhET simulation interface.
How change in the parameters changes the shape of the parabola.
About quadratic polynomials.
About roots of the polynomial and its types.
Change the values of a, b and c and check the graph and its roots.
Find out whether the point lies on the graph or not.
Change the quadratic terms to change the equation.
Show the vertex, axis of symmetry and directrix of the parabola.
Change the directrix and vertex with by changing the parameters.