Plot the points (2,8), (7,8), (12,8).Join these points in pairs. Do they lie on a line? What do you observe ?
Draw XOX' and YOY', the co-ordinate axis on the graph. Take 0.5 cm = 1 unit. Now points A(2,8), B(7,8), and C(12,8) have been plotted on the graph. By joining them, we see that these points lie on the same line which is at a distance of 8 unit from x - axis.