/// <summary>
/// this function is called when the user presses the button Graph
/// it activates the graph gameobject, sets the input polynom for the graph and calls the CreateGraph function
/// </summary>
public void OnGraphPress()
{
graph.SetActive(true);
graphPolynomial.PolynomialEquation = new List <Monom>();
graphPolynomial.PolynomialEquation = initialPolynomialEquation;
graphPolynomial.CreateGraph();
}