Problem with eq of Line Segment

Discussion in 'Homework Help' started by zulfi100, Dec 29, 2013.

  1. zulfi100

    Thread Starter Member

    Jun 7, 2012
    320
    0
    Hi,

    Slide 11 on the following link is showing two eq:
    I got this from:


    www.cse.msu.edu/~cse472/lectures/14.pdf‎


    Line from (x1,y1) to (x2,y2)
    x = x1 + u(x2 - x1)
    y = y1 + u(y2 - y1)

    Can some body plz guide me how we got the above two eq.

    Zulfi.
     
  2. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    The link doesn't work for me.

    But think about what happens if x2 = x1; what is x? in the first equation?

    similarly if y2 = y1; what is y in the second equation?
     
    Last edited: Dec 29, 2013
  3. WBahn

    Moderator

    Mar 31, 2012
    17,737
    4,789
    We've been through this more than once already!

    What is x and y if u=0?

    What is x and y if u=1?

    These are both linear equations. If two parametric linear equations go through two points, then they describe the line that connects those two points.
     
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