document.write( "Question 452453: i need help with writing equations for parabolas and eclipses\r
\n" ); document.write( "\n" ); document.write( "the question i have in this packet im doing is:
\n" ); document.write( "what is the equation of a parabola that opens downward and has an axis of symmetry x=-1\r
\n" ); document.write( "\n" ); document.write( "and from a graph how do you find the equation for an eclipse?\r
\n" ); document.write( "\n" ); document.write( "thank so much \n" ); document.write( "
Algebra.Com's Answer #311011 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
what is the equation of a parabola that opens downward and has an axis of symmetry x=-1
\n" ); document.write( "--------
\n" ); document.write( "y = -(x-1)^2
\n" ); document.write( "\"graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-%28x-1%29%5E2%29\"
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\n" ); document.write( "and from a graph how do you find the equation for an eclipse?
\n" ); document.write( "Find the center at (h,k)
\n" ); document.write( "Find the length of half of the major axis: that's \"a\".
\n" ); document.write( "Find the length of half of the minor axis: that's \"b\".
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\n" ); document.write( "Write the equation:
\n" ); document.write( "(x-h)^2/a^2 + (y-k)^2/b^2 = 1
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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