The graphs of $y$ against $x$ represent four different types of proportionality - Edexcel - GCSE Maths - Question 13 - 2018 - Paper 2
Question 13
The graphs of $y$ against $x$ represent four different types of proportionality.
Match each type of proportionality in the table to the correct graph.
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Worked Solution & Example Answer:The graphs of $y$ against $x$ represent four different types of proportionality - Edexcel - GCSE Maths - Question 13 - 2018 - Paper 2
Step 1
$y \propto x$
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Answer
This represents direct proportionality, so it corresponds to Graph B.
Step 2
$y \propto x^{2}$
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Answer
This indicates quadratic proportionality, corresponding to Graph A.
Step 3
$y \propto \sqrt{x}$
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Answer
This signifies a square root relationship, corresponding to Graph C.
Step 4
$y \propto \frac{1}{x}$
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Answer
This represents inverse proportionality, which corresponds to Graph D.
