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10 cards from this deck
Variables related so one increases at constant rate as other increases
y=kxy = kxy=kx where kkk is a positive constant
Constant of variation
∝\propto∝
yyy is proportional to xxx
Straight line passing through origin (0,0)(0, 0)(0,0)
k=yxk = \frac{y}{x}k=xy
Also increases
Is directly proportional to
y=kxny = kx^ny=kxn
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