# Thread: Help me graph an equation in excel?

1. ## 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

2. 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