Question

If the points (7,-2),(5,1)&(3,k) are collinear find the value of K

Answer 1

If the given 3 points are collinear then the slope of any two points taken will be same. Hence 1-(-2) / 5-7  =  k-1 / 3-5 -3/2 = -(k-1)/2 k = 4