document.write( "Question 1030882: How do I find an equation of the line containing (-1,-3) and (-4,-9)? Writing it as a linear function in slope-intercept form. \n" ); document.write( "
Algebra.Com's Answer #645632 by mananth(16946)\"\" \"About 
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x1 y1 x2 y2
\n" ); document.write( "-1 -3 -4 -9
\n" ); document.write( "
\n" ); document.write( "slope m = (y2-y1)/(x2-x1)
\n" ); document.write( "( -9 - -3 )/( -4 - -1 )
\n" ); document.write( "( -6 / -3 )
\n" ); document.write( "m= 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 ( -1 , -3 ) in
\n" ); document.write( "Y = m x + b
\n" ); document.write( "-3.00 = 2 * -1 + b
\n" ); document.write( "-3.00 = -2 + b
\n" ); document.write( "b= -3 + 2
\n" ); document.write( "b= -1
\n" ); document.write( "So the equation will be
\n" ); document.write( "Y = 2 x -1
\n" ); document.write( "m.ananth@hotmail.ca
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