document.write( "Question 1113423: Find the formula for the quadratic function whose graph has a vertex of (1,2) and passes through the point (-1,-6) where a is unknown.\r
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Algebra.Com's Answer #728479 by MathTherapy(10552) $\"\"$ $\"About$

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Find the formula for the quadratic function whose graph has a vertex of (1,2) and passes through the point (-1,-6) where a is unknown.\r
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Substitute ALL 4 values into the vertex form of a quadratic function:  ======> . 
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document.write( "That is, substitute (1, 2) for (h, k), and (- 1, - 6) for (x, y). You will then get the value of the 5th variable, \"a.\"
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document.write( "Then substitute 3 values: (1, 2) for (h, k), and value of \"a\" into the vertex form of a quadratic function, or .
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document.write( "That's your quadratic function! \n" );
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