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Evgen [1.6K]
3 years ago
12

The variables x and y are directly proportional, and y=2 when x=3. what is the value of y when x=9?

Mathematics
2 answers:
laiz [17]3 years ago
8 0
X varies directly as y
x = ky
3 = 2k
k = \frac{3}{2}
 when x =9
9 = \frac{3}{2}y
\frac{18}{3} = y
∴y = 6

please mark as brainliest
olasank [31]3 years ago
8 0
If x and y are directly proportional, x = ky
When x = 3, y = 2.
So 3 = 2k
k = 3/2
So x = 3y/2
When x = 9,
9 = 3y/2
18 = 3y
y = 6
So when x = 9, y = 6.
Please mark my answer as brainliest. Thank You!

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