The slope formula for two points is
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]where
[tex]\begin{gathered} (x_1,y_1)=(-3,4) \\ (x_2,y_2)=(2,-1) \end{gathered}[/tex]If we substitute these points into the slope formula, we have
[tex]m=\frac{-1-4}{2-(-3)}[/tex]which gives
[tex]\begin{gathered} m=\frac{-5}{2+3} \\ m=\frac{-5}{5} \end{gathered}[/tex]therefore m=-1. The answer is option C
