Point has coordinates and point has coordinates

MATHEMATICS · Single correct · AP · AP Precalculus · Functions with Parameters, Vectors, and Matrices · Functions with Parameters, Vectors, and Matrices

Problem

Point AA has coordinates (2,−3)(2,-3) and point BB has coordinates (−2,5)(-2,5). Which of the following is the unit vector directed from AA to BB? (a) 0.447 i^−0.894 j^0.447\,\mathbf{\hat{i}}-0.894\,\mathbf{\hat{j}} (b) −4 i^+8 j^-4\,\mathbf{\hat{i}}+8\,\mathbf{\hat{j}} (c) −0.447 i^+0.894 j^-0.447\,\mathbf{\hat{i}}+0.894\,\mathbf{\hat{j}} (d) −0.894 i^+0.447 j^-0.894\,\mathbf{\hat{i}}+0.447\,\mathbf{\hat{j}}

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