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Depreciation

Depreciation can be thought of as when something gets reduces over time. This might be the value of a car or the volume of water in a bath.

Linear decay

Linear decay

  • Linear decay is when something decreases by a steady amount over set time periods.
    • E.g. pulling the plug out of a bath will reduce the volume of water in the bath by a set amount each second.
Exponential decay

Exponential decay

  • Exponential decay is when something decreases by a multiplier (or percentage) over set time periods.
Exponential decay example

Exponential decay example

  • A car costs £10,000 when it's new. The value of a car reduces by 10% every two months.
    • After two months, its value has decreased by 10%. It is now worth £10,000 × 0.9 = £9,000.
    • After another two months, it is worth £9,000 × 0.9 = £8,100.
    • After another two months, it is worth £8,100 × 0.9 = £7,290.
    • After another two months, it is worth £7,290 × 0.9 = £6,561.
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1

Number

1.1

Place Value

1.2

Factors & Multiples

1.3

Operations

1.4

Fractions, Decimals & Percentages

1.5

Growth & Decay

1.6

Measurements & Units

1.7

Accuracy

2

Algebra

2.1

Introduction to Algebra

2.2

Graphs

2.3

Solving Equations

2.4

Sequences

3

Ratio, Proportion & Rates of Change

4

Geometry & Measures

4.1

Introduction to Geometry

4.2

Ruler & Compass Constructions

4.3

Perimeter & Area

4.4

Triangles, Quadrilaterals & Circles

4.5

Transformations

4.6

Triangle Formulae

4.7

3D Shapes

4.8

Vectors

5

Probability

6

Statistics

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