I need help please its ap computer science a

What “old fashioned” features of checking accounts is p2p replacing

Which option should u select to ignore all tracked changes in a document

Least square fit to polynomial write a function leastsquarefit3pol that solves a linear system of equations to find a least squares fit of a third order polynomial to an experimental data set given as two row arrays. the function leastsquarefit3pol must explicitly solve a set of linear equations and cannot use polyfit. there should be no restriction on the size of the problem that can be solved.