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10 cards from this deck
Two quantities with constant ratio
y=kxy = kxy=kx
Constant of proportionality
kkk (constant)
Straight line through origin (0,0)(0,0)(0,0)
Constant of proportionality kkk
y=kxy = \frac{k}{x}y=xk
k=xy=8×2=16k = xy = 8 \times 2 = 16k=xy=8×2=16
k=yxk = \frac{y}{x}k=xy
Check if straight line through origin
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