Evaluation of complex slope of a line

If \[A(z_1)\] and \[B(z_2)\] are the two points in the complex plane, then complex plane slope of AB is given  by \[ \frac{z_1-z_2}{\bar{\bar{z_1} -\bar{z_2}}}\]

IF \[ A(2+i)\]  and \[B(3-5i) \] be the two points in the complex plane the slope of the line is given by \[ \frac{-1+6i}{-1-6i}\]

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