Conductivity is one important characteristic of glass. The article “Structure and Proper...

Conductivity is one important characteristic of glass. The article “Structure and Properties of Rapidly Quenched Li₂O-Al₂ONb ₂O₅ Glasses” (J. of the Amer. Ceramic Soc., 1983: 890–892) reports the accompanying data on x = Li₂O content of a certain type of glass and y = conductivity at 500 K

(This is a subset of the data that appeared in the article.) Propose a suitable model for relating y to x, estimate the model parameters, and predict conductivity when Li₂O content is 35.