Question

Y varies directly as x. X=3 when y=12. Find y when x=12. Wouldn't it be 4

Answer 1

`y varies directly as x`

y = kx ( k is our constant of variation ).

They gave us the point (3,12).
Plugging it in allows us to solve for the constant k.

12 = 3k --> k = 4

Is that what you meant by `Wouldn't it be 4`?
The answer to the question is NOT 4.
But that does get us half way through the problem.

Answer 2

Have y = 4 x
Need y = 4(12) as your answer.