extrapolate
US /ɪkˈstræp.ə.leɪt/
UK /ɪkˈstræp.ə.leɪt/
1.
extend the application of (a method or conclusion) to an unknown situation by assuming that existing trends or observations will continue or apply
:
•
We can extrapolate the results to the entire population.
•
It's difficult to extrapolate future trends from limited data.