The slope of the second line is . The slope of the first line is . The equation for a straight line is . The curvature of a straight line is zero. But they didn't line up properly. This marked the end of the Corona taxi line. They may also line up to tip popular performers. The point of view of iteration on the real line was investigated by . Perhaps the most important line to note. It's actually tapping into something deeper than a corporate bottom line. Start with two copies of the line. There are various ways of defining a line. There are many variations on this basic plot line. These are differentiated by their position with respect to the pectinate line. Most zeros lie close to the critical line.