IB skill practice

Interpret phase-line stability

Use equilibrium and sign information to classify stability in a dynamic model.

Paper 1, Paper 2 5 marks Difficulty 3

Interpret phase-line stability - calculator-output interpretation

A phase line for a medical trial model has arrows pointing toward equilibrium \(E\) from both sides: left test value -4 gives a positive rate and right test value 5 gives a negative rate. Enter 1 if \(E\) is stable, otherwise 0. Enter the requested value and choose the interpretation that matches the result.

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