In risk assessment, this process entails postulating a biologic reality based on observable responses and developing a mathematical model to describe this reality. The model may then be used to extrapolate to response levels which cannot be directly observed.

A sub-level of the comprehension level of learning in which students develop sufficient understanding to estimate trends or predict outcomes based upon the subject matter under study.

Used in forecasting, this means calculating the next number in a series by applying a mathematical formula. For example, if last year a magazine sold 1,000 copies, and this year 2,000 copies were sold, what will the sales be next year? A linear extrapolation would be 3,000 (adding 1,000 each year), while a geometric extrapolation would be 4,000 (doubling each year). Projection is a more general term, including extrapolation.

Projecting conclusions from a model or experiment beyond that of the observed time frame or conditions.

A method used in forecasting - much the same as projection. If you drank one cup of coffee yesterday and two today, then you will drink 3 tomorrow (by arithmetical extrapolation: adding one each time) or 4 (by geometric extrapolation - doubling each time). You can do this with letters too. A little puzzle: what comes next, after A H I M

estimate of a value beyond the known range; the continuation of a curve on a graph past the measured points. (see interpolation)

A scientific method of applying or transferring experimental observations from a model to the real world. Extrapolation is frequently necessary because effects in the real world are usually too slow or too minute to measure.

Use of a dataset or model under conditions different from those for which it was established.

The idea of estimating a value by extending information at hand outside its immediate range. In LP, an extrapolation estimate of the optimal objective value uses dual price (y) as a slope: z^(b + h) = z(b) + yh. For a sequence {x^k}, an extrapolation is an estimate of a limit point.

in marketing and advertising research, taking existing data and projecting it to the future as a guide for planning marketing, advertising, and other promotional programs; predicting expected or probable future conditions to aid long-term marketing planning.

Making numerical predictions for the future based on past and current rates or quantities.

(mathematics) calculation of the value of a function outside the range of known values

an inference about the future (or about some hypothetical situation) based on known facts and observations

Method to extend data or inferences from known location to another location for which values are not known.

forecasting trends by assuming they will continue to move as they have in the past. ().

Estimation of data beyond the range of what is known by assuming continuation of trends or patterns within known data. Table of Contents

the process of inferring unknown information by comparison with data that is known.

Making inferences about the unknown by projecting or extending known information, using models and assumptions.

The process of estimating unknown values from known values.

Calculation, based on quantitative observations in exposed test species or in vitro test systems, of predicted dose-effect and dose-response relationships for a substance in humans and other biota including interspecies extrapolations and extrapolation to susceptible groups of individuals: the term may also be used for qualitative information applied to species or conditions that are different from the ones in which the original investigations were carried out

Extending a curve into the future by assuming the variables will continue to behave as they have in the past.

The extension of a relationship between two or more variables beyond the range covered by knowledge, or the calculation of a value outside that range. In synoptic meteorology, extrapolation commonly refers to the forecasting of the position of a weather-pattern feature based solely upon recent past motion of that feature. Compare interpolation.

An estimate of response or quantity at a point outside the range of the experimental data. Also refers to the estimation of a measured response in a different species or by a different route than that used in the experimental study of interest (i.e., species-to-species, route-to-route, acute-to-chronic, high-to-low).

Estimation of unknown values by extending or projecting from known value.

Estimation of the future value of some data series based on past observations. Statistical forecasting is a common example. Syn: projection.