YEAR 9 · FINANCIAL MATHEMATICS

Topic review.

Connect the key ideas, then choose a practice paper.

01 / QUICK RECAP

Connect the ideas.

Use the original amount as the base for percentage change.
Convert annual rates to decimals and time to years in simple-interest models.
Separate fixed and variable costs; compare whole rules, not only their intercepts.
A budget needs all costs, reserves and realistic income assumptions.
Quadratic models have changing first differences; justify the context and domain.
Check units, substituted solutions, rounding and practical limits.

02 / PRACTICE TESTS

Choose a paper and show your working.

Financial mathematics — Practice 1
Percentages, simple interest, fixed costs, budgets and model checks.
16 questions · 44 marks · 60 minutes · Scientific calculator
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Financial mathematics — Practice 2
A different mix of reverse percentages, model comparisons and financial assumptions.
16 questions · 44 marks · 60 minutes · Scientific calculator
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Financial mathematics — Applications
A camp budget, transport choices and constrained financial models.
16 questions · 49 marks · 60 minutes · Scientific calculator
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Curriculum reference & lesson scope

Australian Curriculum v9 / SA Curriculum Mathematics

Year 9 financial modelling within AC9M9A05 and AC9M9M05; supplied hypothetical rates and costs, not financial advice.