document.write( "Question 983524: What is the distance formula between EF with endpoints E (-8,1) and F (1,1) \n" ); document.write( "
Algebra.Com's Answer #604304 by ikleyn(52781)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "First,  compute the vector  EF  (with the start-point  E  and the end-point  F)  in the coordinate form\r
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\n" ); document.write( "\n" ); document.write( " EF = (1 - (-8), 1 - 1) = (9, 0).\r
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\n" ); document.write( "\n" ); document.write( "In other words,  x-component  dx = 1 - (-8) = 9  and  y-component  dy = 1 - 1 = 0.\r
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\n" ); document.write( "\n" ); document.write( "Now,  the length of the vector  EF  is \r
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\n" ); document.write( "\n" ); document.write( "\"sqrt%28dx%5E2+%2B+dy%5E2%29\" = \"sqrt%289%5E2+%2B+0%5E2%29\" = \"sqrt%2881%29\" = 9.\r
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