document.write( "Question 75003This question is from textbook algebra II
\n" ); document.write( ": parabola with vertex at (-3,1) and directrix x=-8 \n" ); document.write( "

Algebra.Com's Answer #53936 by stanbon(75887) $\"\"$ $\"About$

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parabola with vertex at (-3,1) and directrix x=-8
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\n" ); document.write( "Distance from (-3,1) to x=-8 = -3--8=5
\n" ); document.write( "Therefore p=5
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\n" ); document.write( "Plot the vertex and the directrix and you will see the
\n" ); document.write( "parabola opens to the right:
\n" ); document.write( "So the form is (y-k)^2=4p(x-h)
\n" ); document.write( "EQUATION:
\n" ); document.write( "(y-1)^2 = 4*5(x+4)
\n" ); document.write( "(y-1)^2= 20x+80
\n" ); document.write( "x = (1/20)(y-1)^2-4
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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