Mathematics A-Level
growth and decay models
What growth and decay models means in Mathematics A-Level, as defined for WJEC.
Definition of growth and decay models
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Reference: WJEC
Direct proportionality gives dy/dt = ky, where k is positive for growth or negative for decay (dy/dt = −ky with k > 0).
Topics that use growth and decay models
- Differentiation (A2 Unit 3: Pure Mathematics B) (WJEC A-Level)
Related terms
- algebraic simplification
- Chain rule
- compound angle expansion
- concave curves
- connected rates of change
- convex curves
- differential equations formulation
- differentiation from first principles
Using growth and decay models in the exam
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