document.write( "Question 1032297: Find a quadratic model for the set of values: (-2, -20), (0, -4), (4, -20) \n" ); document.write( "

Algebra.Com's Answer #647009 by josgarithmetic(39617) $\"\"$ $\"About$

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You should be able to take advantage of the given root and the easily found symmetry axis with the use of the standard form equation.\r
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\n" ); document.write( "\n" ); document.write( "Two x values give the same y value of $\"-20\"$ . This tells you where the symmetry axis is.\r
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\n" ); document.write( "\n" ); document.write( " $\"y=a%28x-1%29%5E2%2Bk\"$ ----a starter equation\r
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\n" ); document.write( "\n" ); document.write( "Point (-2,-20) gives $\"a%2A%28%28-2%29-1%29%5E2%2Bk=-20\"$
\n" ); document.write( "and
\n" ); document.write( "point (4,-20) gives $\"a%28%284%29-1%29%5E2%2Bk=-20\"$
\n" ); document.write( "and the system easily solvable. \n" ); document.write( "

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