If x1, x2, x3 as well as y1, y2, y3 are in G.P. with the same common ratio, then the points A(x1, y1), B(x2, y2) and C(x3, y3)
If x1,x2 and x3 as well as y1,y2 and y3 are in GP with the same common ratio, the points P(x1,y1), Q(x2,y2) and R(x3,y3)