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Problem solving with linear functions 2.

  1. Sep 11, 2011 #1
    1. The problem statement, all variables and given/known data

    Suppose the selling price p of a product is linearly related to the quantity demanded q. If p=$15 when q=25, and p=$10 when q=100, and if q is at least 20 but not more than 150, find p as a function of q.

    2. Relevant equations

    3. The attempt at a solution

    I couldn't find a sample problem for this so I would just guess that the domain would be
  2. jcsd
  3. Sep 11, 2011 #2


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    Homework Helper

    If you were given two points, could you come up with a linear equation in slope-intercept form? If you can, then you should be able to do answer your question.
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