



 
Hi Kimberly, The statement that y is directly proportional to the square of x means that the proportion of y to x^{2} is always the same number. That is there is a constant k so that
You are told that when x = 2, y = 12. Substitute these values into the above equation and solve for k. You know that k is is a constant so when x = 3, k still has the same value so you can substitute x = 3 into y/x^{2} = k and solve for y. I hope this helps,  


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