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the variables x and y are directly proportional, and y=2 when x=3. What is the value of y when x=9?
Since they are directly proportional, you can set it up as a proportion. I'm going to keep the y's on top and the x's on bottom, so 2/3 = y/9 Cross multiply and you get 18 = 3y Divide both sides by 3 and you get 6 = y Answer: y=6 Hope this helped(:
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