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WRITE a direct proportion equation the relates X and Y when Y= 10 and X = 15

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Suppose y varies directly with x,

y∝ x

y=kx where k is constant of variation.

y=15,x=5

15 = 5k

k=15/5

k=3

y=3x

x=9, y=3*9=27
(idk if this helps. I hope it helps you :)

User Hrdwdmrbl
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One such direct proportion would be y = (2/3)x. Note that (2/3)(15) = 10, as expected and desired.


User Amon
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