document.write( "Question 58537This question is from textbook
\n" ); document.write( ": given these two points on a line, write the equation in slope-intercept form:
\n" ); document.write( "(5,-13) and (2,-1)
\n" ); document.write( "i did the coordinate approach and came out with: -1-(-13)/2-5=-4, which is the slope. to find the y=intercept, i took one of the points and did: 2=-4(-1)+b. I came out with 2=4+b. now subtracted 4 from both sides and got: 4-2=4+b-4 which simplifies to:-2=b. so my final equation would read: y=-4x+(-2). is this correct?? \n" ); document.write( "
Algebra.Com's Answer #40078 by checkley71(8403)\"\" \"About 
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TO FIND THE SLOPE WE USE THE (Y2-Y1)/(X2-X1) VALUES THUS\r
\n" ); document.write( "\n" ); document.write( "(-1+13)/(2-5)=12/-3=-4 FOR THE SLOPE\r
\n" ); document.write( "\n" ); document.write( "THE FORMULA FOR THE LINE IS Y=mX+b\r
\n" ); document.write( "\n" ); document.write( "SO WE HAVE Y=-4X+b\r
\n" ); document.write( "\n" ); document.write( "NOW SUBSTITUTING EITHER SET OF POINTS FOR X AND Y WE GET THE VALUE b\r
\n" ); document.write( "\n" ); document.write( "-13=-4*5+b
\n" ); document.write( "-13=-20+b
\n" ); document.write( "-13+20=b
\n" ); document.write( "b=7
\n" ); document.write( "THUS THE FORMULA FOR THIS LINE THROUGH (5,-13)(2,-1) IS Y=-4X+7
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