[sdiy] Thermistor cunductance curve question

[puff adder]

I have a thermistor and I tried to find its data sheet instead I found that its part #'s were really just absis and ordinate points for its conductance curve (10k @ 21degrees celsius or written 21T10K ). How do I figure out the curve? Do I use some exponential formula or something? It may be off subject but I need a place to ask this question. I can math. yes. please. thanks.
puf_adder at yahoo.com.

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