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10 questions from this quiz
They maintain a constant ratio
y=kxy = kxy=kx
yx\frac{y}{x}xy
The origin (0,0)(0,0)(0,0)
The constant of proportionality kkk
555
777 litres
y=kxy = \frac{k}{x}y=xk
444
Check if it's a straight line through origin
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