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

Which of the following sets of points would give functions?

  1. May 12, 2004 #1
    ok... this is the thing... i've got a math assignment due tomorrow and i need help!!! argh.. its on functions so if theres anybody who can help me, please do..

    if you could, would you help me with this question:

    "Which of the following sets of points would give functions? Explain your answer."
    {(1,4),(2,5),(3,6),(4,7),(5,8)}

    i'd really appreciate it...
    thx :confused:
     
  2. jcsd
  3. May 12, 2004 #2

    chroot

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    I'm not sure I understand the question. There seems to be only one set. Further, "points" don't necessarily have anything to do with functions. I assume that the first member of the pairs is in the domain of a function, and the second member is the range -- but I'm still not sure what it means to "give a function."

    Can you provide more context on how this question was presented?

    - Warren
     
  4. May 13, 2004 #3

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    A list of (x,y) pairs certainly can give a function. In a sense it is y= f(x) where x must be one of the first numbers in the pairs and y is the second number in that same pair. A "function" specifically has the property that you do not have the same "x" (first number) with two different "y"s (second number). That is, you cannot have, for example, (3, 7) and (3, 5) in the same "function". Since, in the example given, the first numbers are 1, 2, 3, 4, 5 with no repeats, it IS a function.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Which of the following sets of points would give functions?
  1. Functions and Sets? (Replies: 19)

Loading...