Which is the correct terms for points that  do not lie on the same line ?

Points (4 , 2) , (7 , a) and (9 , 7) are collinear . What 's the value of a ?

 Given that the points P (6, 1), Q (15, 6), and R (x, 3) are collinear. Find x.

 Given that the points P (8, 1), Q (15, 7), and R (x, 3) are collinear. Find x.

_________________ method are used to find whether the three points are collinear or not, they are:

Points (3, 1), (1,  -1)  and (5, y)  are collinear. What is the value of y ? 

The area of the triangle formed by the points (k - 1 , k + 1) ,  (k + 3 , k - 3 ) and ( k + 1 , k + 2) is

Vertices of a triangle are (-2,0),(3,0) and (0,5). Area of this triangle is ______________ (in sq. units)

Find a relation between x and y, if the points (x,y), (1,2) and (7,0) are collinear.

The points  (12, 7), (5,5) and (-1,4)  are ________________________  .