when 2 people run the same query with same data on 2 different machines why is the result different mysql

The "instance" relationship shows that something is an object of a

Which of the following commands is more recommended while creating a bot?

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.