Question

find k if the points (0,k) (1,2) and (-2,-1) are collinear

Answer 1

Answer:

Consider the points as A,B and C.

Assume that,Abacus is a triangle.

Since A,B,& C are collinear,

Area of triangle ABC=0.

Applying the formula for finding the area of a triangle, you can find the answer.

I hope you are brilliant enough to understand and continue it yourself.