Show that the points P(- 2 , 3, 5) , Q (1, 2, 3) and R(7, 0, -1) are collinear.

Show that the points A (-2, 3, 5), B(1, 2, 3) and C(7, 0, -1) are collinear.

Show that the points (2, 3, 4), (-1, -2, 1), (5, 8, 7) are collinear.

Prove by using the distance formula that the points A (1,2,3), B (-1, -1, -1) and C (3,5,7) are collinear.

Determine if the points (1, 5), (2, 3) and (-2, -11) are collinear.

Show that the points (3, 2) (-2, -3) and (2, 3) are collinear or non-collinear.

Show that ( -2,3,5) ( 1,2,3) (7,0,-1) are collinear

Show that the points (0,-1), (2, 1), (0, 3), and (-2, 1) are the corners of a square.

Using distance formula, show that the points (1,5), (2,4) and (3,3) are collinear.

Show that the points A(1,2,7),B(2,6,3) and C(3,10,-10 are collinear.

The points (5, 2, 4), (6,-1, 2) and (8, -7, k) are collinear if k is equal to :