document.write( "Question 1199703: 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) \n" ); document.write( "

Algebra.Com's Answer #833667 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
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)
\n" ); document.write( "--------------------
\n" ); document.write( "

\r\n" );
document.write( "| x   y   1|\r\n" );
document.write( "|-7   9   1| = 0\r\n" );
document.write( "| 8   9   1|\r\n" );
document.write( "

\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
\n" ); document.write( " \n" ); document.write( "

\n" );