Proportion Flashcards

GCSE Mathematics (Edexcel) 1MA1

Direct proportion

A relationship where as one quantity increases, the other increases at the same rate.

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Terms in this set (10)

1

Direct proportion

A relationship where as one quantity increases, the other increases at the same rate.

2

Inverse proportion

A relationship where as one quantity increases, the other decreases at the same rate.

3

Proportionality constant (k)

The constant value in the relationship between two directly proportional quantities, expressed as y = kx.

4

Equation for direct proportion

y = kx, where k is the constant of proportionality.

5

Equation for inverse proportion

y = k/x, where k is the constant of proportionality.

6

Graph of direct proportion

A straight line passing through the origin with a positive gradient.

7

Graph of inverse proportion

A curve that approaches the axes but never touches them (a hyperbola).

8

Solving direct proportion problems

Find the constant k by dividing one quantity by the other, then use y = kx to find missing values.

9

Solving inverse proportion problems

Find the constant k by multiplying the two quantities, then use y = k/x to find missing values.

10

Proportion in real-life problems

Used to solve problems involving rates, recipes, scaling, and conversions.

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