Suppose that points x and y are fixed in R and set a) Prove that if for (a, b) R2, then the system is solved

Suppose that points x and y are fixed in R" and set

a) Prove that if

for (a, b) ˆˆ R2, then the system

is solved by

And

b) Prove that if a0 and b0 are given by part a), then the straight line whose graph is closest to the points (x1, y1),..., (xn, yn)-that is, such that

is minimized -is the line λ(x) = a0x + b0.

1 ! F(a, b) := (3%-(ark + b))2 a F (a, b) = 0 =-(a,b) ab do do