[BlindMath] Advice on writing

[Jim Hefferon]

Hello, I have an electronically-available text that I am updating and
I'd like to make it accessible.  Is there is a good source how to
write to be most effective?  I'm not asking about technical concerns
such as output format, but rather what to put on that page.  My
audience is college undergraduates who are post-Calculus.  I
personally do not have a vision impairment.

In particular, I find writing alt text for mathematical graphics very
challenging.  I have seen recommendations to keep it below a certain
number of characters, but "graph of the function" cannot be the best
thing I can do, surely.

Naturally I've looked for literature (and the archives of this list)
and found a fair bit of both papers and video presentations about
students at the secondary level, but not much above that.  No doubt my
library skills are not up to the task. If someone could share a
pointer or two I'd be very grateful.

Regards,
Jim Hefferon