document.write( "Question 567453: Describe how you would determine an equation for a line given the ordered pairs for two points on that line. \n" ); document.write( "
Algebra.Com's Answer #366569 by mananth(16946)\"\" \"About 
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\n" ); document.write( "Let the points be (x1,y1) & (x2,y2)\r
\n" ); document.write( "\n" ); document.write( "x1 y1 x2 y2
\n" ); document.write( "3 2 2 1
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\n" ); document.write( "slope m =(y2-y1)/(x2-x1)
\n" ); document.write( "( 1 - 2 )/( 2 - 3 )
\n" ); document.write( "( -1 / -1 )
\n" ); document.write( "m= 1
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\n" ); document.write( "Plug value of the slope and point ( 3 ,2 ) in
\n" ); document.write( "Y = m x + b
\n" ); document.write( "2.00 = 3 + b
\n" ); document.write( "b= 2 - 3
\n" ); document.write( "b= -1
\n" ); document.write( "So the equation will be
\n" ); document.write( "Y = 1 x -1
\n" ); document.write( "m.ananth@hotmail.ca
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