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

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asked Jan 12, 2018 234k views

1 Answer

Milana · Answer 1 · 2018-01-16T19:49:10+0000

y = kx is the direct variation equation, where k is the constant of variation.
Find k.

2 = k * 3
2/3 = k

Write the variation equation.
y = (2/3)x

Plug in new value.
y = (2/3)* 9
y = 6

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

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