Real-life graphs (Edexcel GCSE Maths): Flashcards

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Real-life graphs
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Real-life graphs

Visual representations of everyday situations with measurable data

Most common scale reading mistake

Assuming each square equals one unit

Value per square if 10 squares = £50

£50÷10=£5£50 \div 10 = £5 per square

Fixed cost definition

One-off charge that doesn't change regardless of usage

Fixed cost location on graph

Y-intercept (where line crosses y-axis)

Variable cost definition

Cost that changes depending on usage

Variable cost shown by

Gradient (steepness) of the line

Gradient of a line represents

Rate of change between two variables

Steeper gradient means

Higher rate of change (more expensive per unit)

Gentler gradient means

Lower rate of change (cheaper per unit)

Gradient in distance-time graph shows

Speed

Break-even point definition

Where lines cross; both options cost exactly the same

Best option at low usage levels

Option with lowest starting point

Best option at high usage levels

Option with gentlest gradient

How to calculate gradient

Vertical change divided by horizontal change

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