+" b + c = "+polynomial_ys[2].toFixed(1);
    polynomial_formula = document.getElementById("polynomial_formula");
    polynomial_formula.innerHTML = "a = " + X[2].toFixed(2) + ", b = " + X[1].toFixed(2) + ", c = " + X[0].toFixed(2);
    polynomial_formula.innerHTML += "<br>";
    polynomial_formula.innerHTML += "P(x) = " + X[2].toFixed(2) + "x<sup>2</sup> + " + X[1].toFixed(2) + "x + " + X[0].toFixed(2);

    polynomial_context.beginPath();
    polynomial_context.lineWidth = 2;
    polynomial_context.stroke