document.write( "Question 966396: The vertex of this parabola is at (-3, -1). When the y-value is 0, the x-value is 4. What is the coefficient of the squared term in the parabola's equation?\r
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Algebra.Com's Answer #590643 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Use the vertex form,
\n" ); document.write( "\"y=a%28x-h%29%5E2%2Bk\"
\n" ); document.write( "\"y=a%28x%2B3%29%5E2-1\"
\n" ); document.write( "Use the point to solve for \"a\",
\n" ); document.write( "\"0=a%284%2B3%29%5E2-1\"
\n" ); document.write( "\"1=a%287%5E2%29\"
\n" ); document.write( "\"a=1%2F49\"
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