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Find the slope of a line joining the given points.
 
S. No Points Slope
(i) \((-6,1)\) and \((-3,2)\) ii
(ii) \(\left(\frac{-1}{3}, \frac{1}{2} \right)\) and \(\left(\frac{2}{7}, \frac{3}{7} \right)\) ii
(iii) \((14,10)\) and \((14,-6)\)