Direction Command
From GeoGebra Manual
- Direction( <Line> )
- Yields the direction vector of the line.
- Example:
Direction(-2x + 3y + 1 = 0)yields the vector u= \begin{pmatrix} 3 \\ 2 \end{pmatrix}
- Note: A line with equation ax + by = c has the direction vector (b, - a).
