@Brandon9000,
Okay. Then here's what I think your problem is:
For historical reasons, TeX and LaTex can work in either of two different modes: The historically older mode outputs DVI files and can import graphics only in the encapsulated PostScript format (eps). The more modern mode outputs PDF files and has a broader choice of input formats: jpeg, PNG, PDF, and MetaPost -- but, so far, not eps.
To make LaTex display your graphics in dvi mode, you will have to import them into your document as eps files -- and then you'll need extra steps to produce PDFs from the dvi. (To repeat, the (La)Tex mode that directly outputs PDFs cannot import jpeg graphics.)
How do you get your graphics into eps format? I can think of two methods: Method 1 is a mere nuisance, but might produce good-enough output for you. Method 2 is a pain in the arm but produces optimal quality.
Method 1: Convert the jpeg you already have to eps
For this, you can use Image Magick's command line tool "convert". (Image Magick is a collection of Open Source tools specialized on image conversion.)
Step 1: Download the Image Magic installer from its homepage and run it:
http://www.imagemagick.org/script/binary-releases.php#windows
Step 2: Convert your file by starting the Windows command line, "cmd", and typing "convert myimage.jpg myimage.eps". Of course you want to replace "myimage" with your actual filename.
Step 3: From LaTex, import the image. I use the graphicx package (not sure what you use), so the minimal Latex file that would do the work would look something like this:
Code:\documentclass{article}
\usepackage{graphicx}
% your other preliminaries go here
\begin{document}
\includegraphics[scale=1.0]{myimage} % Note the absence of a file extension.
% Use the "scale" parameter above to tweak the image's size in your document.
\end{document}
There's a lot of other options to the \includegraphics command that you can use to tweak the imported picture. A tutorial on them is webbed
here.
Method 2: Directly generate eps from Excel
In an ideal world, Excel could save to eps files. But this is not an ideal world, so what you need to do instead is to print the graph to a file, using a postscript printer driver (I use Apple Color Laser Writer) with special printing options to guarantee the output of an eps file that is portable across platforms and printers. In all likelihood, you then have to hand-tweak the bounding box by editing the eps file in Notepad. As you might have guessed, this is where it becomes a major pain in the arm.
In exchange for your pain, you end up importing a true vector graphic. This way, your image will never look pixelish, no matter how large your magnification or how fine your printer resolution. This method is worth the trouble if, and probably only if, you're shooting for publication quality PDFs.
I'll walk you through it if you want me to, but let's see first if method 1 is good enough for you.
