Exam-style question
Try this first
In a functions-in-modelling question, which check is most important after choosing a function model?.
- A.State what the variables represent and comment on limitations or refinements of the model.
- B.Assume the model is exact for every future input value.
- C.Replace the model with an unrelated quadratic equation.
- D.Give only a numerical answer without explaining the context.
Model answer
What a good answer should say
- The correct answer is State what the variables represent and comment on limitations or refinements of the model.
- This is the best choice because it names the A-level method being tested and explains the mathematical check needed for this objective.
This answer is tied to the objective: B11 Use functions in modelling, including consideration of limitations and refinements of the models..
Explanation
Why this works
Use the explanation to connect the worked answer back to B11 Use functions in modelling, including consideration of limitations and refinements of the models..
State what the variables represent and comment on limitations or refinements of the model. is correct.
It is specific to the learning objective, keeps the method visible, and avoids the generic shortcut described by the distractors.
Maths method check
- Topic focus: Pure Mathematics.
- Question style: practice.
- Reasoning demand: application.
- Check the operation, notation, units, and final answer form against the question before moving on.
Common mistake
No common mistake is linked to this question yet.