Determine if the columns of the matrix A = - 2 1 4 0 84 4 t 0 are linearly independent.

Find the change of coordinates matrix, P, from C to B if B = {b₁,b₂), C = {c₁, c₂), b₁ = (7,-2), b₂ = (2, -1), c₁ = (4,1), c2 = (5,2) O P = [a₁ a₂], a₁ = (3,-2), a₂ = (8,-5) O P = [a₁ a₂], a₁ = (8,-5), a2 = (3,-2) ○ P = [a₁ a₂], a₁ = (2,-5), a₂ = (3,-8) OP [a1 a2], a₁ = = (3,-8), a2 = (2,-5) O P = [a₁ a₂], a₁ = (-3,2), a₂ = (-8, 5)