Can someone please help me? I have no clue what any of this is and how I'm going to find out 15 examples of these. It's due sometime today. Thank you!

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.

Healthy study habits are best described as

Approximately what portion of global employers tends to use social media websites to hire new employees?