The equation of a line through the origin:
ax+by=0
A sample:
You can drag the red dot to change the slope of the line, that is, influence a and b. The vector pointing to the red dot represents the direction vector.
Change the value of x by dragging the slider:
The equation of a line through the origin:
ax+by=c
A sample:
You can drag the red dot to change the slope of the line, that is, influence a and b. The vector pointing to the red dot represents the direction vector. The length of this vector influences c.
Change the value of x by dragging the slider: