document.write( "Question 239583: If the points (-1, 7) and (k,-2) are on a line with slope -1, what is the value of k?
\n" ); document.write( "F)-8 G)8 H) 11 J) -6 \n" ); document.write( "

Algebra.Com's Answer #175788 by College Student(505) $\"\"$ $\"About$

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The Point-Slope Form formula is: $\"y-y1=m%28x-x1%29\"$
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\n" ); document.write( "All you need to do here is substitute the values and solve for missing value.
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\n" ); document.write( "m=-1 (m=slope)
\n" ); document.write( "y=-2
\n" ); document.write( "y1=7
\n" ); document.write( "x=k
\n" ); document.write( "x1=-1 (the missing value)
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\n" ); document.write( " $\"y-y1=m%28x-x1%29\"$
\n" ); document.write( " $\"-2-7=-1%28k-%28-1%29%29\"$
\n" ); document.write( " $\"-9=-1%28k%2B1%29\"$
\n" ); document.write( " $\"-9=-k-1\"$
\n" ); document.write( " $\"-8=-k\"$
\n" ); document.write( "Now divide by -1 on both sides to determine the value of k.
\n" ); document.write( " $\"8=k\"$
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\n" ); document.write( "Done! \n" ); document.write( "

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