Math Is Fun Forum

mamoo

Member

Registered: 2007-09-06

Posts: 3

least square system using matrix

hello
i have encountererd a problem with my assignment.
finidng the least square system of a system of coordinates.
i have been able to find it without the use of matrices. but the question insists of using matrices.
here is the questiion
consider the following data (x,y)= (0.2,4.459), (0.4,5.05),(0.6,6.2), (0.8,6.6) , (1.0,7.4)
Find the best straight lines , y=mx+c through all these points, by solving a least squares sysem of the type
               

by defining the matrix A, the column vectors U and B appropriately.

how to find matrix A, U and B ?

please help
thnx in advance