Answer: extrapolating

AnswerCrossword Clue
extrapolatingExtend (a graph, curve, or range of values) by inferring unknown values from trends in the known data
extrapolatingExtend the application of (a method or conclusion, esp. one based on statistics) to an unknown situation by assuming that existing trends will continue or similar methods will be applicable
extrapolatingEXTRAPOLATE, to infer (values of a variable in an unobserved interval) from values within an already observed interval
extrapolatingEstimate or conclude (something) in this way