How to get equation of line for Weibull curve using probplot?

Hello all,

I have set of censored data points from Weibull distribution. I used probplot function to plot these points on weibull curve. I am getting a perfect straight line as expected. But I don't know how to get equation of this straight line? Can anybody tell me how can we determine curve fit equation from the probplot option?

Thank you in advance,

Nik