document.write( "Question 458664: What equation contains the points (-1,-8) and (-9,-21) \n" ); document.write( "

Algebra.Com's Answer #314616 by rfer(16322) $\"\"$ $\"About$

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slope
\n" ); document.write( "m=(-21--8)/(-9--1)
\n" ); document.write( "m=-13/-8
\n" ); document.write( "m=13/8
\n" ); document.write( "---------------
\n" ); document.write( "y=mx+b
\n" ); document.write( "-9=13/8*-1+b
\n" ); document.write( "-9=-13/8+b
\n" ); document.write( "-9+13/8=b
\n" ); document.write( "-72/8+13/8=B
\n" ); document.write( "-59/8=b
\n" ); document.write( "b=-7.4
\n" ); document.write( "------------
\n" ); document.write( "y=13/8x-7.4 \n" ); document.write( "

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