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?

Find the value of x for which the points (x-1),(2,1) and (4,5) are collinear.

Find the value of t for which the points (1,-1),(3,-3) and (t,2) lie on the same line (using determinants).

Find the value of x for which the points (x ," "1) , (2," "1) and (4," "5) are collinear.

Find the value ofa, so that the point (8, a) lie on the line 2x-3y =5.

Find the value of x, if the points A(3,2,1),B(4,x,5),C(4,2,2)and(6,5,-1) are coplanar.

If the points (x,y,-3), (2,0,-1) and (4,2,3) lie on a Straight line, then what is the value of x and y respectively?