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Computer model: a series of mathematical equations that can be used to simulate a real situation, such as the stopping distance of a car driven at different speeds in different road conditions

Components of a simple model:

  • Input values: usually entered by the user, values are not present within the model
  • Variables: those items of data that we are likely to change in the model
  • Constants: those values in a model that do not change in the short term or you want to keep the same
  • Constraints: a limit that is imposed on a model
  • Rules (i.e. calculations and other operators): calculations and operations used when making a model

Benefits of being able to answer 'what if' questions:

  • can see the effect of changing values
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