document.write( "Question 1199707: Show how you use matrices to write an equation for a line that passes through the following points:\r
\n" ); document.write( "\n" ); document.write( "(4, -10), (1, -1) \n" ); document.write( "

Algebra.Com's Answer #833672 by Alan3354(69443) $\"\"$ $\"About$

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\n" ); document.write( "Show how you use matrices to write an equation for a line that passes through the following points:\r
\n" ); document.write( "\n" ); document.write( "(-7, 9), (8, 9)
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document.write( "| x   y   1|\r\n" );
document.write( "|-7   9   1| = 0\r\n" );
document.write( "| 8   9   1|\r\n" );
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\n" ); document.write( "x*(9-9) - y*(-7-8) + 1*(-7*9 - 8*9) = 0
\n" ); document.write( "15y -135 = 0
\n" ); document.write( "y = 9
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document.write( "| x   y   1|\r\n" );
document.write( "| 4 -10   1| = 0\r\n" );
document.write( "| 1   1   1|\r\n" );
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\n" ); document.write( "x*(-10*1 - 1*1) - y*(4*1 - 1*1) + 1*(4*1 - 1*-10) = 0
\n" ); document.write( "-11x -3y + 14 = 0
\n" ); document.write( "11x + 3y = 14
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