This is done by subtracting the coordinates of the second point from the first point. We denote these differences as $\Delta x$, $\Delta y$, and $\Delta z$ respectively.
So, we have:
\[\Delta x = x_2 - x_1 = 0 - 1 = -1\]
\[\Delta y = y_2 - y_1 = 2 - 1 =
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