Get polynomial equation

[D0nVitalio]

Hi. I need code which accept array of coordinates [[x1,y1],[xn+2,yn+1],..] and returns polynomial equation.
Found this:
http://polynomialregression.drque.net/ which gives me f( x ) = 6 x3 - 6.25 x2 + 0.6 x + 0.65

Does https://github.com/PHPOffice/PhpSpreadsheet/blob/master/src/PhpSpreadsheet/Shared/Trend/PolynomialBestFit.php
can take coordinates and return polynomial equation?