SOLUTION: The variables x and y are directly proportional, and y=2 when x=3. What is the vale of y when x=9 I need to know how to work it out not the answer so much.

Algebra ->  Linear-equations -> SOLUTION: The variables x and y are directly proportional, and y=2 when x=3. What is the vale of y when x=9 I need to know how to work it out not the answer so much.      Log On


   

Question 888317: The variables x and y are directly proportional, and y=2 when x=3. What is the vale of y when x=9 I need to know how to work it out not the answer so much.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
y = kx
2 = k*3
k = 2/3
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When x = 9,
y = (2/3)*9
y = 6