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Home > PC > Chapter 12 > Lesson 12.2.1 > Problem 12-42


Recall from Chapter 10 that the line through the points and can be described by the vector equation for .

  1. Let and . Since and , verify that in this case  .

    Use substitution.

  2. Rewrite this expression as .

    Use the distributive property, then combine like terms.

  3. Show that this line goes through the point .

    If is on the line, then is possible.


    Does t have the same value in both equations?
    If it is on the line, then it should.