document.write( "Question 1128836: write an equation of the line that passes through the given points...
\n" ); document.write( "(-2,8) and (1,2)
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Algebra.Com's Answer #745347 by Alan3354(69443) $\"\"$ $\"About$

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write an equation of the line that passes through the given points...
\n" ); document.write( "(-2,8) and (1,2)
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\n" ); document.write( "Here's 1 way to do that:
\n" ); document.write( "Find the slope, m
\n" ); document.write( "m = diffy/diffx = -6/3 = -2
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\n" ); document.write( "y-y1 = m*(x-x1) where (x1,y1) is either point
\n" ); document.write( "y-2 = -2*(x-1)
\n" ); document.write( "y = -2x + 4
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\n" ); document.write( "Here's another way:
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document.write( "| x   y   1|\r\n" );
document.write( "|-2   8   1| = 0\r\n" );
document.write( "| 1   2   1|\r\n" );
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\n" ); document.write( "x*(8-2) - y*(-2-1) + 1*(-4-8) = 0
\n" ); document.write( "6x + 3y = 12
\n" ); document.write( "2x + y = 4\r
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