Slope is given by the expression:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
We can equal both slopes of mAC and mCE
[tex]\begin{gathered} \frac{3-6}{-1-(-3)}=\frac{-3-3}{3-(-1)} \\ \\ \frac{-3}{2}=-\frac{6}{4} \\ -\frac{3}{2}=-\frac{3}{2} \end{gathered}[/tex]
Answer is B.
