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Cosider the points A and B shown below.

Michael Hawks. Created for Albert.io. Copyright 2016. All rights reserved.

The unit vector in the direction of the vector pointing from point A to point B is:

$-0.67\hat{i}+0.33\hat{j}$

$-0.89\hat{i}+0.45\hat{j}$

$-0.80\hat{i}+0.20\hat{j}$

$-4.0\hat{i}+2.0\hat{j}$