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Math Help - function problem

  1. #1
    Junior Member
    Joined
    Apr 2010
    Posts
    36

    function problem

    Hi i'm having a bit of a brain freeze here and need help with this problem.

    ok so, Company A charges $30 per month and $0.20 per minute for phone calls , whereas Company B charges $20 per month and $0.25 per minute. how do i determine a formula for the phonebill form company A and company B as a function of the number of minutes that you talk per month?

    any help would be awesome!
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  2. #2
    Senior Member
    Joined
    Oct 2009
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    295
    Thanks
    9
    I guess you're looking for

    Company A
     f(m)= 30+0.20m

    Company B
    f(m)=20+0.25m

    m=the number of minutes
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  3. #3
    Junior Member
    Joined
    Apr 2010
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    hey, thanks heaps. that was way too easy!
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