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/9Cross multiply and you get 18 = 3yDivide both sides by 3 and you get 6 = yAnswer: y=6Hope this helped(: