document.write( "Question 285905: Let f be the function given by f(x)=x^3-6x^2. The graph is concave up when\r \n" );
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document.write( "(A) x > 2 \n" );
document.write( "(B) x < 2 \n" );
document.write( "(C) 0 < x < 4 \n" );
document.write( "(D) x < 0 or x > 4 only \n" );
document.write( "(E) x > 6 only \n" );
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