document.write( "Question 363034: Are the points (-1,8), (1,2), and (4,-7) on the same line? Explain your reasoning \n" ); document.write( "
Algebra.Com's Answer #258760 by mananth(16949)\"\" \"About 
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Are the points (-1,8), (1,2), and (4,-7) on the same line? Explain your reasoning
\n" ); document.write( "...\r
\n" ); document.write( "\n" ); document.write( "find the slope of the line passing through (-1,8) (1,2)
\n" ); document.write( "m=2-8/1-(-1)
\n" ); document.write( "=-6/2
\n" ); document.write( "=-3
\n" ); document.write( "...
\n" ); document.write( "form an equation using (-1,8). If the other two points satisfy the equation then all points are collinear.
\n" ); document.write( "y-8=-3(x-(-1)
\n" ); document.write( "y-8=-3x-3
\n" ); document.write( "y=-3x-3+8
\n" ); document.write( "y=-3x+5
\n" ); document.write( "..
\n" ); document.write( "point 1,2
\n" ); document.write( "2=-3(1)+5
\n" ); document.write( "2=-3+5
\n" ); document.write( "2=2 ( TRUE)
\n" ); document.write( "point (4,-7)
\n" ); document.write( "-7=-3*4+5
\n" ); document.write( "-7=-12+5
\n" ); document.write( "-7=-7 (TRUE)
\n" ); document.write( "so the lines are collinear
\n" ); document.write( "...
\n" ); document.write( "m.ananth@hotmail.ca
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