Hi I wanted to know how am I suppose to approach this proble

Hi I wanted to know how am I suppose to approach this problem. The section we are working on is 4.3 of gilbert strang book. It is on Least squares approximation but there is no example on how to solve this.

Find the best line At + B approximating the data set b at the times t = 0, 1, 2, 3, 4. (a) b = 1, 1, 2, 0, 0. (b) b = 1, 0, 2, 0, 0.

Solution

Soluion: sir in your question clearity is not coming, in this question B and b is same or not

given 4.3 gilvert streng book, line At+B

a): t=0,1,2,3,4

at t=0, b=-1            line     -1

at t=0, b=-1            line    -1

at t=0, b=2             line     2

at t=0, b=0            line     0

as like at t=1, t=2, t=3 & t=4             we get 25 line

b): at t=0,12,3,4          &   b=-1, 0, 2, 0, 0

at t=0, b=-1              line -1

at t=0, b=0              line 0

at t=0, b=2               line 2

as like we get again 25 line

best line means=?, what is want to say me ?