document.write( "Question 243661: i want to know how to graph y=-x^2+16x , bt i want to know how todo the t-table . \n" ); document.write( "

Algebra.Com's Answer #178510 by Edwin McCravy(20054) $\"\"$ $\"About$

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$\"y=-x%5E2%2B16x\"$
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document.write( "Start with this t-table:\r\n" );
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document.write( " x | y\r\n" );
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document.write( "   | 0\r\n" );
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document.write( "First find the x-intercepts by substituting 0 for y\r\n" );
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document.write( "This give us two points with y=0\r\n" );
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document.write( " x | y\r\n" );
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document.write( " 0 | 0\r\n" );
document.write( "16 | 0\r\n" );
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document.write( "Now choose a value of x halfway between\r\n" );
document.write( "the two x-intercepts:\r\n" );
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document.write( " x | y\r\n" );
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document.write( " 0 | 0\r\n" );
document.write( "16 | 0\r\n" );
document.write( " 8 |\r\n" );
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document.write( "So we have this t-table:\r\n" );
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document.write( " x |  y\r\n" );
document.write( "--------\r\n" );
document.write( " 0 |  0\r\n" );
document.write( "16 |  0\r\n" );
document.write( " 8 | 64\r\n" );
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document.write( "Use a large scale to accommodate those points.\r\n" );
document.write( "It is not necessary to mark off the x-axis and \r\n" );
document.write( "y-axis with the same scale.\r\n" );
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document.write( "Plot those three points:\r\n" );
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document.write( "Draw an upside-down U-shaped curve through those two points:\r\n" );
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document.write( "Edwin

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