AQA · Mathematics · 8300
GCSE Maths: Graphs: conversion graphs (interpret)
Statistics · AQA GCSE Maths (8300). Cards are generated from the Corbettmaths textbook exercise and practice questions for Graphs: conversion graphs (interpret) (Corbettmaths Video 152), and every card links back to the exact page it came from. Practice tests are drawn from this deck’s own cards. Source material © Corbettmaths — used with attribution.
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What is a conversion graph used for?
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A conversion graph is used to convert between two different units or currencies by reading values from a straight-line graph.
On a conversion graph, how do you convert from one unit to another?
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Read a value on one axis, trace horizontally or vertically to the line, then read the corresponding value on the other axis.
The approximate conversion between miles and kilometres is 5 miles ≈ ?.
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8 kilometres
The exchange rate given for pounds to Indian rupees is £1 = ?.
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90 Rupees
The conversion between stones and pounds is 1 stone = ?.
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14 pounds
When drawing a conversion graph, what must be decided for each axis?
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The unit being measured and the scale (range of values from 0 to a maximum).
Why is a conversion graph typically a straight line?
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Because the relationship between the two units is proportional (linear), with a constant conversion rate.
When using a conversion graph to convert values beyond the graph's range, what technique is required?
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Extrapolation — extending the line beyond the plotted points, or using the conversion rate to calculate directly.
What is the first step when comparing prices in different currencies using conversion graphs?
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Convert both prices to the same currency, then compare the numerical values.
When a conversion graph question involves two separate conversion graphs, what is the general strategy?
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Use the first graph to convert to an intermediate currency, then use the second graph to convert to the target currency.
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