document.write( "Question 766083: Find the slope of the line that passes through the points (2,7) and (4,2) \n" ); document.write( "
Algebra.Com's Answer #466660 by mananth(16946)\"\" \"About 
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x1 y1 x2 y2
\n" ); document.write( "2 7 4 2
\n" ); document.write( "
\n" ); document.write( "slope m = (y2-y1)/(x2-x1)
\n" ); document.write( "( 2 - 7 )/( 4 - 2 )
\n" ); document.write( "( -5 / 2 )
\n" ); document.write( "m= -5/2
\n" ); document.write( "The required line passes through both the points. So we select one point and plug it with the slope
\n" ); document.write( "Plug value of the slope and point ( 2 , 7 ) in
\n" ); document.write( "Y = m x + b
\n" ); document.write( "7.00 = -5/2 * 2 + b
\n" ); document.write( "7.00 = -5 + b
\n" ); document.write( "b= 7 + 5
\n" ); document.write( "b= 12
\n" ); document.write( "So the equation will be
\n" ); document.write( "Y = -5/2 x + 12
\n" ); document.write( "m.ananth@hotmail.ca
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