Results 1 to 2 of 2

Math Help - Understanding Function Notation?

  1. #1
    Junior Member
    Joined
    May 2011
    Posts
    26

    Understanding Function Notation?

    I have a question in my textbook that I can not figure out. I am still a little bit confused about all of this because I haven't done any of it in a while.
    The question is:

    Evaluate f(4) for each of the following:
    a) f= {(1,5), (3,2), (4,1), (6,2)}
    b) is a chart with x and f(x) values
    c) is the equation f(x) 3x^2 - 2x + 1
    d) is a graph

    The only one I know how to evaluate is the equation. I am not sure what to do with the set of ordered pairs. once I can understand what needs to be done there, I am sure I'll understand how to do the other two. I am thinking that I need to take an ordered pair and make it into an equation but I am not sure? Hopefully someone can explain what this is asking? Thanks.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    May 2011
    Posts
    26
    Alright, I did a few more questions and came back to this one and found the answer. I thought I'd post it incase anyone ever runs into this problem.
    y= f(x)
    a) y= f(x)
    y= f(4)
    y= 1 ...... I just found the function where X=4 and the answer for y is 1
    b) I just took the value for x from the chart and found the value that went with it for f(x)... since f(x) = y
    c) I found the point where f(4) was and noted what the y value was

    I guess it was a pretty simple question that I made complicated in my head before I did it. It really helps to skip ahead to the next question sometimes...
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Understanding Matrix Suffix Notation
    Posted in the Advanced Algebra Forum
    Replies: 2
    Last Post: May 9th 2011, 09:25 AM
  2. Replies: 2
    Last Post: January 23rd 2011, 07:49 PM
  3. Replies: 3
    Last Post: September 6th 2010, 12:55 AM
  4. help understanding this notation
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: April 11th 2008, 02:44 AM
  5. Need help understanding summation notation problem...
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: November 23rd 2006, 04:51 AM

Search Tags


/mathhelpforum @mathhelpforum