1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Linear Math Lines

  1. Nov 6, 2009 #1
    1. The problem statement, all variables and given/known data

    Find a and b such that the point (a,b,0) lies on the line passing through (-1,-1,6) and (-9,7,2)

    2. Relevant equations

    Basic line equations, from P to Q= Q-P..etc

    3. The attempt at a solution

    I keep getting the wrong answer, but I got a point at exactly P (-1,-1,6) and a direciton by doing Q-P...and solving for z=0...
  2. jcsd
  3. Nov 6, 2009 #2


    User Avatar
    Homework Helper

    so the line equation is
    L(t) = P + t*(Q-P)

    show your work, but soudns like you're heading in the right direction, solve for t, when z=0 as you say, then substitute back into line
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Linear Math Lines
  1. Linear Graph Line (Replies: 8)

  2. Linear lines (Replies: 3)

  3. Linear Math Inverse (Replies: 4)

  4. Linear Math Vector (Replies: 1)