Create a finite line segment coincident with the hypothetical infinite line described by an equation in the form $y=ax+b$. In this equation, $a$ encodes the slope of the line, while $b$ encodes the location where the line intercepts the y-axis.

Note that vertical lines cannot be created with this component, as they would be parallel with the y-axis, and thus not intercept it anywhere. In fact even near vertical lines are fraught as they require very large values for $a$ and $b$, and computer mathematics with large values is inaccurate.