Answer - The order of convergence of Regula Falsi method is 1.618.
The Regula Falsi, also known as the method of false position or the false position method, is a very old and still-used approach to solving equations with a single unknown in mathematics. When we compare the power of the two sides, we have p=1+1/p, which results in p = 1 root(5). By ignoring the negative sign, we arrive at P = 1.618 as the Secant method's rate of convergence.
Order of Convergence of Regula Falsi Method is
The order of convergence of Regula Falsi method is 1.618. This is the oldest method for computing the real roots of an algebraic equation.