document.write( "Question 449100: I need help finding an equation of the line containing the given pair of points. Answer needs to be in x=a, y=b, or y=mx+b.
\n" ); document.write( "(-9, -9) and (2, 2)
\n" ); document.write( "y= \n" ); document.write( "

Algebra.Com's Answer #308977 by Leaf W.(135) $\"\"$ $\"About$

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==> Find the slope. Using points ( $\"x%5B1%5D\"$ , $\"y%5B1%5D\"$ ) and ( $\"x%5B2%5D\"$ , $\"y%5B2%5D\"$ ), the equation for slope (m) is

\n" ); document.write( "Simplify: $\"m+=+%282+%2B+9%29%2F%282+%2B+9%29\"$
\n" ); document.write( "Add: $\"m+=+11%2F11\"$
\n" ); document.write( "Simplify/Divide: $\"m+=+1\"$
\n" ); document.write( "So, the slope of your equation is 1.
\n" ); document.write( "==> Next, find the equation of the line by plugging in the slope and coordinates of one of the points in to point-slope form, or $\"y+-+y%5B1%5D+=+m%28x+-+x%5B1%5D%29\"$ . For ( $\"x%5B1%5D\"$ , $\"y%5B1%5D\"$ ), I am going to choose (-9, -9), but you could also use (2, 2). $\"y+-+%28-9%29+=+1%28x+-+%28-9%29%29\"$
\n" ); document.write( "Simplify: $\"y+%2B+9+=+1%28x+%2B+9%29\"$
\n" ); document.write( "Since 1*a = a, you can simplify 1(x + 9) into just x + 9: $\"y+%2B+9+=+x+%2B+9\"$
\n" ); document.write( "Subtract 9 from both sides: $\"y+=+x\"$
\n" ); document.write( "That is in y = mx + b form, as it can also be seen as y = 1x + 0.
\n" ); document.write( "***THEREFORE, YOUR FINAL ANSWER IS $\"y+=+x\"$ \n" ); document.write( "

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