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10 cards from this deck
It maintains a constant ratio between two quantities.
y=kxy = kxy=kx, where kkk is the constant of proportionality.
It remains constant for all pairs of xxx and yyy values.
A straight line through the origin (0,0)(0,0)(0,0).
It represents the constant of proportionality kkk.
It would cost £4, maintaining the same ratio.
Speed is proportional to distance if time is constant.
Calculate the constant of proportionality kkk.
Ensure the graph is a straight line through the origin.
k=y/x=10/2=5k = y/x = 10/2 = 5k=y/x=10/2=5.
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