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equation of a plane

Discussion in 'Mathematics' started by Piranha, Mar 22, 2011.

  1. Piranha

    Piranha Star commenter

    To answer your second question, a line has two = signs and a plane has only one. A simple example of the latter is z=0, which permits x and y to take all real values so is the usual 2D Cartesian plane. On that basis, 2x+y=11 is a plane.
  2. fieldextension

    fieldextension New commenter

    You need to know how many dimensions you are working in to tell. In 2D, 2x+y=11 is the equation of a line. In 3D, 2x+y=11 is the equation of a plane.
  3. ...and in fact the plane 2x + y = 11 is vertical. Its intersection with the xy plane (z=0) is the line 2x + y = 11.

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