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Math Help - functions PLEASE HELP ME!!!!!!!!!

  1. #1
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    Question functions PLEASE HELP ME!!!!!!!!!

    Use a graphing calculator to graph the function and visually determine the intervals on which the function is increasing, decreasing, or constant.
    I have a TI84 Plus calculator and have no clue how to graph this.
    f(x)= 4x, x<2
    f(x)= 8, 2<x<6
    f(x)= (-1/2x)+11 x>6
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  2. #2
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    Quote Originally Posted by iheartthemusic29 View Post
    Use a graphing calculator to graph the function and visually determine the intervals on which the function is increasing, decreasing, or constant.
    I have a TI84 Plus calculator and have no clue how to graph this.
    f(x)= 4x, x<2
    f(x)= 8, 2<x<6
    f(x)= (-1/2x)+11 x>6
    Hello,

    I've attached a serie of screenshots which shows the steps what you have to do:

    As you can see you add the domain of the piece of a function in brackets to the term of the piece of function which has to be put in brackets too.

    1. Yscl = 1. This value is covered by the cursor.

    2. The graph which is drawn by the calculator is wrong: The vertical parts have to be removed. (I don't know how to get the calculator to stop this nonsense )
    Attached Thumbnails Attached Thumbnails functions PLEASE HELP ME!!!!!!!!!-stckweise_fkt.jpg  
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  3. #3
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    earboth's Avatar
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    Quote Originally Posted by iheartthemusic29 View Post
    Use a graphing calculator to graph the function and visually determine the intervals on which the function is increasing, decreasing, or constant.
    I have a TI84 Plus calculator and have no clue how to graph this.
    f(x)= 4x, x<2
    f(x)= 8, 2<x<6
    f(x)= (-1/2x)+11 x>6
    Hello,

    as you certainly have recognized at once the graph in my previous post was completely wrong. I did your problem again - and finally the calculator delivered a correct graph.

    Only to show you where I made the mistake I don't delete my previous post. There are only minor changes but they are obviously necessary.
    Attached Thumbnails Attached Thumbnails functions PLEASE HELP ME!!!!!!!!!-stckweise_funkktion1.gif  
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