document.write( "Question 414294: If y varies inversely as the square of x and y=9 when x=2, write the equation of variation and find the value of x when y=4. \n" ); document.write( "
Algebra.Com's Answer #290588 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi
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document.write( "If y varies inversely as the square of  x  OR y = k/x^2
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document.write( "y = 9  when x = 2        9 = k/4   k = 36
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document.write( "find  the value of x when y = 4
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document.write( " y = 36/x^2
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document.write( " 4 = 36/x^2
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document.write( " x^2 = 9
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document.write( "  x = ± 3 \n" );
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