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Math Help - Help me graph an equation in excel?

  1. #1
    Newbie
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    Mar 2010
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    Help me graph an equation in excel?

    Hi guys,

    New here and I'm hoping someone may be able to help me?

    I need to graph the following equation in excel and I can't remember how to do it?

    y=6x(squared)+3x-18


    I'd really appreciate any help you can give me
    Thanks
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  2. #2
    Super Member Bacterius's Avatar
    Joined
    Nov 2009
    From
    Wellington
    Posts
    927
    Hello,
    here's how I would have done :

    I would have created a column named x in A1. In A2, I put "=-20". Then, in A3, I put "=A2 + 1". Then I use the quick formula copy, so that I get a column of -20 \leq x \leq 20. Then, in B1, I put f(x), and in B2 I write "=6*A2*A2 + 3*A2 -18. Then I use the quick formula copy to extend the column f(x) as far as the column x goes. Thus I get two sets of data, x and f(x), which I can plot using the graph wizard
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