\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
For \(A\left(\textcolor{colordef}{-1},\, \textcolor{colorprop}{3}\right)\) and \(B\left(\textcolor{colordef}{2},\, \textcolor{colorprop}{-1}\right)\), find the slope of the line \(\Line{AB}\).
Slope of \(\Line{AB}\) =