Find the slope of the line through the points :
(1, 2), (4, 2).

Find the slope of the line through the points : (3, -2), (3, 4).

Find the slope of the line through the points : (4, 6), (2,12)

Find the slope of the line through the points : (0, - 4), (- 6, 2).

Find the slope of the line through the points (4,-6)(-2,-5)

Find the slope of the line passing through the points : (3, - 2) and (7, -2).

Find the vector equation for the line through the points : (1,2,2) and (6,4,6) .

Find the equations of the line through the point (1,2,4) and parallel to the line 3x+2y-z=4, x-2y-2z=5.

The slope of the line passing through the points (3,-2) and (-1,4) is:

Show that the line through the points (4, 7, 8), (2, 3, 4) is parallel to the line through the points (– 1, – 2, 1), (1, 2, 5).

Find the equation of the plane through the points (2,2,-1) and (3,4,2) and parallel to the line whose direction ratios are .