If the example you gave is any reflection of your real needs,
I'd suggest GD + GD::Graph (or at least GD). Imager and
Image::Magick are certainly more powerful tools, with nice
supporting websites and docs, but if you only need to do
simple things, GD's i/f cuts to the chase PDQ. And the
most recent releases provide some nice new functions as
well (e.g., alpha channels).
Caveat: GD has proven to be a PITA to build/install in some environments, tho PPMs for common platforms are usually readily available. And font support has also been a sticky issue, tho the latest releases seem to provide some better solutions than just FreeType (I haven't had a chance to try it out yet, but hope to RSN).
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