document.write( "Question 670688: What is the equation in standard form of a Parabola that contains the following points?
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Algebra.Com's Answer #417048 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( " y = ax^2 + bx + c  || (0,4) ⇒ c = 4
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document.write( "    4a - 2b  = -22  (-18-c)   ||Mult 1st Eq by 2 and Add to 2nd
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document.write( "   16a + 4b  = 20   (24-c)
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document.write( "     24a= -24
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document.write( "      a = -1   and b =  9 
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document.write( "y = -x^2 +9x + 4 \n" );
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