For what value of `x` will the points `(x ,\ -1),\ (2,\ 1)` and `(4,\ 5)` lie on a line?

For what value of x the points (x,-1),(2,1) and (4,5) lie on a line?

For what value of x, the points (x,-1), (2, 1) and (4,5) are collinear?

For what value(S)of K the point (1,-1),(2,1) and (K,5) lie on the same line?

For what value of k will the point (3,- k) lie on the line 9x + 4y = 3 ?

The value of x such that the points (8,1),(x,-4) and (2,-5) are collinear is:

Show that the three points (5, 1), (1, -1) and (11, 4) lie on a straight line. Further find the slope of the line.

Find the set of values of a if the points (1,2) and (3,4) lie to the same side of the straight line 3x-5y+a=0

If each of the points (x_1, 4), (-2,y_1) lies on the line joining the points (2, -1), (5, -3), then the points P(x_1, y_1) lies on the line :