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

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

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) are collinear?

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

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

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 value of k and b, if the points P(-3, 1) and Q(2, b) lie on the locus of x^(2)-5x+ky=0 .

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

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