[PopAlongKid]

Many years ago, in college, I used to volunteer for Recording For The Blind, reading various math texts aloud. I had to verbally describe every illustration in the textbook, including graphs, using a few concise statements. Not perfect, but possible.

[tsimionescu]

You can describe any graph to some low level of detail, sure. But does it actually help anyone? Do people with complete blindness, for example, gain anything from hearing a description of the graph of f(x) = x as "a straight line at a 45° angle crossing the graph at 0", compared to what seeing people gain from viewing that graph?