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

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

1.	Find a relation between x and y if the points (x,y),(1,2) and (7,0) are collinear
Answer» Take area of triangle as zero and put the values in the formula.0= 1/2(formula)Ans.=x+3y-7