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Find an equation of variation in which y varies directly as x and y=18 when x=9. Then find the value of y when x= 16.
4 years ago

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Shakiyla
I think it’s y=2x and y is 32 when x=16 am I right
4 years ago
mathhelper
y varies directly as x ----> y = kx

given: when y = 18 then x = 9
18 = 9k
k = 18/9 = 2

so y = 2x

so when x = 16, y = 2(16) = 32

you are right!
4 years ago

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