Greatest Integer Function.. help

  1. Greatest Integer Function.. help!!

    1. The problem statement, all variables and given/known data
    Well this is the problem a plomer charges 80 bucks ones he arrives at your home and charges and extra 25 per hour.. Give the equation,,
    Kind of i dont get it is for extra credit but still i dont like it when i dont know how to do it

    2. The attempt at a solution
    i put these but i think is wrong..
    y=28[(x+1)]+80
    But if i put 1hour.. plus 1 gives 2 hours so he would be chargin 2 hours just for working one..
    Nice deal!! hahaha But still i dont think this is it
     
  2. jcsd
  3. tiny-tim

    tiny-tim 26,054
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Kino! Welcome to PF! :smile:
    Well, basically it's right (except for the "28" of course :wink:) …

    you just need to replace (x+1) by something else …

    then you can check that it's right in exactly the same way that you checked that (x+1) was wrong. :smile:

    (btw, what did this have to do with "greatest integer"? :confused:)
     
  4. Re: Greatest Integer Function.. help!!

    I meant the parentesis are the integers signs but i didnt now how to put them...
    But today i may get the answer so i'll publish it
     
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