document.write( "Question 1204148: Identify the co-vertices of the ellipse (x-3)^2 + {(y-5)^2/9} = 1 \n" ); document.write( "
Algebra.Com's Answer #840216 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "\r\n" );
document.write( "\"%28x-3%29%5E2+%2B+%28y-5%29%5E2%2F9%5E%22%22+=+1\"\r\n" );
document.write( "\r\n" );
document.write( "Learn to compare every ellipse equation with\r\n" );
document.write( "\r\n" );
document.write( "\"%28x-h%29%5E2%2F%22%28+%29%22%5E2+%2B+%28y-k%29%5E2%2F%22%28+%29%22%5E2=1\"\r\n" );
document.write( "\r\n" );
document.write( "If the larger denominator is under the x-term, then the ellipse looks like this  \"drawing%2820%2C10%2C-2%2C2%2C-1%2C1%2Carc%280%2C0%2C-3.9%2C1.9%29+%29\"\r\n" );
document.write( "\r\n" );
document.write( "If the larger denominator is under the y-term, then the ellipse looks like this  \"drawing%2810%2C20%2C-1%2C1%2C-2%2C2%2Carc%280%2C0%2C1.9%2C-3.9%29+%29\"\r\n" );
document.write( "\r\n" );
document.write( "Put a 1 under your first term:\r\n" );
document.write( "\r\n" );
document.write( "\"%28x-3%29%5E2%2F1%5E%22%22+%2B+%28y-5%29%5E2%2F9%5E%22%22+=+1\"\r\n" );
document.write( "\r\n" );
document.write( "So since the y-term has the larger denominator, you know it looks like this: \"drawing%2810%2C20%2C-1%2C1%2C-2%2C2%2Carc%280%2C0%2C1.9%2C-3.9%29+%29\"\r\n" );
document.write( "\r\n" );
document.write( "Write the denominators as squares:\r\n" );
document.write( "\r\n" );
document.write( "\"%28x-3%29%5E2%2F1%5E2+%2B+%28y-5%29%5E2%2F3%5E2+=+1\"\r\n" );
document.write( "\r\n" );
document.write( "The center is always the point (h,k).  'a' is always half of the major axis\r\n" );
document.write( "and 'b' is always half of the minor axis.  So your ellipse is of the form\r\n" );
document.write( "\r\n" );
document.write( "\"%28x-h%29%5E2%2Fb%5E2+%2B+%28y-k%29%5E2%2Fa%5E2+=+1\"\r\n" );
document.write( "\r\n" );
document.write( "'a' is always the square root of the larger denominator and 'b' is always the\r\n" );
document.write( "square of the smaller denominator. Again, your ellipse is of the form\r\n" );
document.write( "\r\n" );
document.write( "\"%28x-h%29%5E2%2Fb%5E2+%2B+%28y-k%29%5E2%2Fa%5E2+=+1\" compared to \"%28x-3%29%5E2%2F1%5E2+%2B+%28y-5%29%5E2%2F3%5E2+=+1\"\r\n" );
document.write( "\r\n" );
document.write( "The center is (h,k) = (3,5), a=3, b=1\r\n" );
document.write( "\r\n" );
document.write( "So draw the center (3,5), the major axis goes up and down,\r\n" );
document.write( "\r\n" );
document.write( "so draw in the major axis up 3 and down 3 from the center (3,5).\r\n" );
document.write( "\r\n" );
document.write( "Then, draw in the minor axis left 1 and right 1 from the center (3,5). \r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Then draw in the ellipse:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Now you can look at the graph and see that the vertices are\r\n" );
document.write( "at the ends of the major axis, (3,2) and (3,8), and that the\r\n" );
document.write( "co-vertices are at the ends of the minor axis (2,5) and (4,5)\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" ); document.write( "
\n" );