ABSTRACT
A line which is parallel to neither axis has an algebraic equation in inter section form
^ + | = l; a o it meets the coordinate axes at (a, 0) and (0, b) respectively. A line which is parallel to one of the axes, but equal to neither, has an equation in
x zi intersection form either — = 1, if it is parallel to the y-axis, or — = 1, if
a b it is parallel to the x-axis; the intersections with the appropriate axis are respectively x = a or y = b. See Figure 1.1.
