How Can I Post a Graph (and have people be able to read it)

We have a problem and I'm sure that there's a simple solution that we're not thinking of. So I figure I'll toss it out into the blogosphere and maybe someone can help us out.

We've been keeping housing data in an excel spreadsheet we want to post a graph in the blog so that our readers can see it. We tried turning it into a jpg and throwing it up on flickr and adding it to a post like we would a picture, but that didn't work. It was too small and it wasn't readable.

We also tried grabbing a screenshot with Snagit, but that didn't work either.

I'm tired of searching for the answer and I'm hoping that someone can help a Realtor out.

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