A regression model is used to express a variable Y as a function of another variable X, this implies that

There is a causal relationship between Y and X

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Values of X exactly determine values of Y

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A value of X may be used to estimate a value of Y

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There is no causal relationship between Y and X

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Solution

The correct option is A There is a causal relationship between Y and X
A regression model is a part of a causal or economic method which is used for making forecasts for planning production schedules in the short range.

Note: The main aim of the causal method is to establish a relation so that changes in one variable will be useful for the prediction of another.

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