Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Calc III problem

  1. Jan 22, 2012 #1
    1. The problem statement, all variables and given/known data
    Find an equation for the plane containing the line in the xy-plane where y = 1, and the line in the xz-plane where z = 2


    2. Relevant equations
    Ax+By+C= f(x,y) or (z)


    3. The attempt at a solution
    Ok so i started off by graphing and i see when x and y are 0 z = 2 and when z and x are x
    y = 1
    So i know that to find the slope n (Δz/Δy) = 2/1 = 2

    After this I am lost as what to do. I use cramster, but the explanation is poor and
    says Ax+By+Cz = 1, but I don't see how this equation is related.
     
  2. jcsd
  3. Jan 22, 2012 #2

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    What line in the yz-plane is is also in the plane whose equation you are looking for?
     
  4. Jan 22, 2012 #3
    z = 2 -2y?
     
  5. Jan 22, 2012 #4

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Correct !
     
  6. Jan 22, 2012 #5
    Thanks for the help. Much appreciated. This one was bothering me for a while.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook