Question

How to find equation of line in coordinate geometry if two or more points are given?

Answer 1

to wrie a equation of any line at least 2 points are required.
now....for writing equation chose any 2 given points.
let . one of them be (X1,Y1) and another be (X2,Y2)
now .....put the values of X1,Y1,X2 and Y2  in this formula and u will get required equation of line.
(X-X1)/(X1-X2)=(Y-Y1)(Y1-Y2)

Answer 2

B=y-mx
where:m  is the slope of the line, found using methods described in Slope of a Line (Coordinate Geometry).x and y are the coordinates of any point on the line.