Locus Tool

Select a point B that depends on another point A and whose locus should be drawn. Then, select point A to create the locus of point B.

  • Type f(x) = x^2 – 2 x – 1 into the Input Bar and press the Enter-key.

  • Place a new point A on the x-axis (see Mode point.svg Point tool or Point command).

  • Create point B = (x(A), f'(x(A))) that depends on point A.

  • Select the tool Mode locus.svg Locus and successively select point B and point A.

  • Drag point A along the x-axis to see point B moving along its locus line.

Point A has to be a point on an object (e.g. line, segment/interval, circle).

Warning Warning:

Locus is undefined, if the dependent point depends on Point Command with two parameters or PathParameter Command.

See also Locus command.