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Answers for “这如何扩展到三维空间?”

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In linear algebra, a coordinate pair like (3,−2)(3, -2) is viewed not just as a static location, but as scaling factors. The first number scales the horizontal unit vector i^\hat{i}, and the second scales the vertical unit vector j^\hat{j}.

Conditions: Working within a standard 2D Cartesian coordinate system; Using the standard unit basis vectors i^\hat{i} and j^\hat{j}

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In a 2D plane, the first component dictates horizontal movement (right positive, left negative) and the second dictates vertical movement (up positive, down negative) from the origin to the tip.

Conditions: Standard Cartesian coordinate system; Vector anchored at the origin