Using section formula,show that the points A(-3,-1),B(1,3) and C(-1,1) are coollinear

Using section formula,show that the points A(-3,-1),B(1,3) and C(-1,1)

1.	Using section formula,show that the points A(-3,-1),B(1,3) and C(-1,1) are coollinear
Answer» Use area of triangle or distance formula... Not possible to solve from section formula