Having trouble with a math problem

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1

<p>From the College Board Blue Book</p>

<p>If y is directly proportional to x^2 and y=1/8 when x=1/2 what is hte positive value of x when y=9/2</p>

<p>So, if y=1/8 when x=1/2 that means y=1/8 when x^2=1/4. So y is half of x, so when y=9/2 x should be 9. The book says the answer is 3. I don't get how. Any help would be appreciated.</p>

2

<p>y is one half of x SQUARED, not one half of x. :p</p>