Question

Show that the following points are collinear.

(4, 1), (5, - 2) and (6, - 5)

Answer 1

If x1(y2−y3)+x2(y3−y1)+x3(y1−y2) =0 Then the points are collinear .............. 4(-2+5) + 5( -5 -1) + 6( 1+2) = 4x3+5x-6 +6x3 = 12-30+18=0 so the points are collinear