Ch. 1. What is Multivariate Analysis? Vectors and Linear Transformations 1. What is the dot product of (1 2 3) and ( 1 1 -1 )? (A) 0 (B) 3 (C) 6 (D) 9 2. What is the dot product of (1 2 3) and ( 1 1 1 )? (A) 0 (B) 6 (C) 3 (D) 9 3. What is the dot product of (1 2 3) and ( 0 0 1 )? (A) 0 (B) 6 (C) 3 (D) 9 4. Rectangle example. Express length and width L and W in terms of S = L W and D = L-W. (A) L = (S D)/2, W = (D S)/2 (B) L = S D, W = S-D (C) L = (S D)/2, W = S-D (D) L = (S D)/2, W =(S-D)/2