Which statement best describes a worksheet? a. an intersection of a row and a column b. a horizontal group of cells c. a multiple spreadsheet d. a single spreadsheet e. a vertical group of cells

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.