Which relation defines y as a function of x?
For every permitted x, y = 2x + 1 gives exactly one y-value. The other relations can give two y-values for one x.
Specification EDB-SSM-2017-HKEAA-2026-2029. Explore a topic, practise the skill, and see where to focus next.
Try three questions →Explore the topic map ↓
HKEAA M2 · EDB-SSM-2017-HKEAA-2026-2029LearningP is independent of HKEAA M2. Use the current official documents for assessment requirements.
Try three different Mathematics skills from this HKEAA M2 route. See what went right, understand a mistake, and find a useful next step.
A small preview of how LearningP turns answers into a clearer learning picture for students and parents.
For every permitted x, y = 2x + 1 gives exactly one y-value. The other relations can give two y-values for one x.
Expanding gives 6 - 4i + 3i - 2i². Since i² = -1, this is 6 - i + 2 = 8 - i.
Convert to exponential form: x - 1 = 2³ = 8. Hence x = 9, which satisfies x - 1 > 0.
These tiles show your answers to three questions. They are a starting point, not a mastery score or grade prediction.
Correct answer: y = 2x + 1
For every permitted x, y = 2x + 1 gives exactly one y-value. The other relations can give two y-values for one x.
Correct answer: 8 - i
Expanding gives 6 - 4i + 3i - 2i². Since i² = -1, this is 6 - i + 2 = 8 - i.
Correct answer: x = 9
Convert to exponential form: x - 1 = 2³ = 8. Hence x = 9, which satisfies x - 1 > 0.
For parents: look at the explanation together. A correct answer is encouraging; a missed answer gives you something specific to work on. Broader practice over time is needed to understand progress.
Quadratic equations in one unknown requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Quadratic equations in one unknown requires. Keep exact values until the final step and check signs, units and reasonableness.
Functions and graphs requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Functions and graphs requires. Keep exact values until the final step and check signs, units and reasonableness.
Exponential and logarithmic functions requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Exponential and logarithmic functions requires. Keep exact values until the final step and check signs, units and reasonableness.
More about polynomials requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what More about polynomials requires. Keep exact values until the final step and check signs, units and reasonableness.
More about equations requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what More about equations requires. Keep exact values until the final step and check signs, units and reasonableness.
Variations requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Variations requires. Keep exact values until the final step and check signs, units and reasonableness.
Arithmetic and geometric sequences and their summations requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Arithmetic and geometric sequences and their summations requires. Keep exact values until the final step and check signs, units and reasonableness.
Inequalities and linear programming requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Inequalities and linear programming requires. Keep exact values until the final step and check signs, units and reasonableness.
More about graphs of functions requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what More about graphs of functions requires. Keep exact values until the final step and check signs, units and reasonableness.
Equations of straight lines requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Equations of straight lines requires. Keep exact values until the final step and check signs, units and reasonableness.
Basic properties of circles requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Basic properties of circles requires. Keep exact values until the final step and check signs, units and reasonableness.
Loci requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Loci requires. Keep exact values until the final step and check signs, units and reasonableness.
Equations of circles requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Equations of circles requires. Keep exact values until the final step and check signs, units and reasonableness.
More about trigonometry requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what More about trigonometry requires. Keep exact values until the final step and check signs, units and reasonableness.
Permutations and combinations requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Permutations and combinations requires. Keep exact values until the final step and check signs, units and reasonableness.
More about probability requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what More about probability requires. Keep exact values until the final step and check signs, units and reasonableness.
Measures of dispersion requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Measures of dispersion requires. Keep exact values until the final step and check signs, units and reasonableness.
Uses and abuses of statistics requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Uses and abuses of statistics requires. Keep exact values until the final step and check signs, units and reasonableness.
Further applications of mathematics requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Further applications of mathematics requires. Keep exact values until the final step and check signs, units and reasonableness.
Inquiry and investigation requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Inquiry and investigation requires. Keep exact values until the final step and check signs, units and reasonableness.
Odd and even functions requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Odd and even functions requires. Keep exact values until the final step and check signs, units and reasonableness.
Mathematical induction requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Mathematical induction requires. Keep exact values until the final step and check signs, units and reasonableness.
The binomial theorem requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what The binomial theorem requires. Keep exact values until the final step and check signs, units and reasonableness.
More about trigonometric functions requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what More about trigonometric functions requires. Keep exact values until the final step and check signs, units and reasonableness.
Introduction to e requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Introduction to e requires. Keep exact values until the final step and check signs, units and reasonableness.
Limits requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Limits requires. Keep exact values until the final step and check signs, units and reasonableness.
Differentiation requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Differentiation requires. Keep exact values until the final step and check signs, units and reasonableness.
Applications of differentiation requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Applications of differentiation requires. Keep exact values until the final step and check signs, units and reasonableness.
Indefinite integration requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Indefinite integration requires. Keep exact values until the final step and check signs, units and reasonableness.
Definite integration requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Definite integration requires. Keep exact values until the final step and check signs, units and reasonableness.
Applications of definite integration requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Applications of definite integration requires. Keep exact values until the final step and check signs, units and reasonableness.
Determinants requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Determinants requires. Keep exact values until the final step and check signs, units and reasonableness.
Matrices requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Matrices requires. Keep exact values until the final step and check signs, units and reasonableness.
Systems of linear equations requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Systems of linear equations requires. Keep exact values until the final step and check signs, units and reasonableness.
Introduction to vectors requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Introduction to vectors requires. Keep exact values until the final step and check signs, units and reasonableness.
Scalar product and vector product requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Scalar product and vector product requires. Keep exact values until the final step and check signs, units and reasonableness.
Applications of vectors requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Applications of vectors requires. Keep exact values until the final step and check signs, units and reasonableness.
Inquiry and investigation requires the correct mathematical rule, exact working and a final check that the result satisfies the conditions in the question.
Watch for: Do not select a familiar formula before identifying what Inquiry and investigation requires. Keep exact values until the final step and check signs, units and reasonableness.
No matching topics. Try another search.
HKEAA M2 · HKDSE · Mathematics · EDB-SSM-2017-HKEAA-2026-2029
EDB curriculum and HKEAA 2026-2029 assessment frameworks
Source checked: 2026-08-27. The current official specification controls assessment requirements and option choices.
Yes. This page offers three original questions from three different skills on this exact course. Each answer has an explanation, followed by a sample heatmap showing what was correct and what to revisit. No account is needed, and taster answers are not saved.
It shows the outcome of these three answers and gives a specific skill to discuss or practise next. It is not a full assessment, a mastery score or a grade prediction. Broader practice over time is needed to understand progress.
LearningP currently maps 38 assessed areas for specification EDB-SSM-2017-HKEAA-2026-2029. The visible topic map below is derived from the verified route; the current official specification remains controlling.
The verified source bank contains 380 original LearningP question records for this route. Every mapped area meets the current publication minimum and passed the latest blocker and review audit.
No. LearningP uses official specifications and assessment materials to map content and demand, while its practice questions and explanations are independently authored.
No. LearningP reports practice evidence, coverage, strengths and gaps. It does not guarantee or automatically predict examination outcomes.
Use the official HKEAA M2 specification and assessment-resource pages linked on this page, together with information supplied by the learner’s school.