document.write( "Question 629664: Find the equation of the lines that goes through the given points (2,-4) and (-3,-9). Write the equation in both standard form and slope-intercept form.
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Algebra.Com's Answer #396410 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Find the equation of the lines that goes through the given points (2,-4) and (-3,-9). Write the equation in both standard form and slope-intercept form. \n" ); document.write( "---------------- \n" ); document.write( "The hard way: \n" ); document.write( "find the slope \n" ); document.write( "use the slope and either point to find the y-intercept \n" ); document.write( "--> y = mx + b \n" ); document.write( "================== \n" ); document.write( "Use determinants: \n" ); document.write( "---- \n" ); document.write( "|+x +y 1| \n" ); document.write( "|+2 -4 1| = 0 \n" ); document.write( "|-3 -9 1| \n" ); document.write( "Note: +x and +y are for alignment \n" ); document.write( "--------- \n" ); document.write( "x*(-4+9) - y*(2+3) + 1*(-18-12) = 0 \n" ); document.write( "5x - 5y = 30 \n" ); document.write( "x - y = 6 \n" ); document.write( "=============== \n" ); document.write( "y = x - 6 \n" ); document.write( " \n" ); document.write( " |