Phase portraits and coupled DEs
Exam-style Phase portraits and coupled DEs questions for IB Mathematics Applications & Interpretation HL, with full worked solutions and mark allocations matching real IB marking schemes.
Start practising → Formula sheet (PDF) ↗Sample questions
- Easy Stable vs unstable from eigenvalue sign No Calculator [3]
- Medium Volume of revolution No Calculator [4]
- Hard Phase portrait - eigenvalue analysis No Calculator [4]
About this topic
These are original, exam-style questions written to match the IB Mathematics syllabus for Applications & Interpretation HL. Every question comes with a full step-by-step worked solution, with mark allocations matching real IB marking schemes. Questions are labelled Paper 1 (no calculator) or Paper 2 (calculator allowed) so you practise under realistic exam conditions.
How to practise
- Open the question bank using the button above.
- Attempt the question, writing out your working.
- Reveal the full worked solution and compare your method step by step.
- Use the difficulty and calculator filters to focus on what you need most.