to predict by projecting past experience or known data
extrapolate
verb(ex-trap-o-late)
to project, extend, or expand (known data or experience) into an area not known or experienced so as to arrive at a usually conjectural knowledge of the unknown area
extrapolate
verb(ex-trap-o-late)
to infer (values of a variable in an unobserved interval) from values within an already observed interval