document.write( "Question 72994: i need help graphing equations for example:i need help on using k=Mx+b= and the Y2-Y1
\n" ); document.write( "X2-X1
\n" ); document.write( "please help me i would like that very much \n" ); document.write( "

Algebra.Com's Answer #52220 by checkley75(3666) $\"\"$ $\"About$

You can put this solution on YOUR website!
Y=mX+b IS THE STANDARD LINE EQUATION FOR GRAPHING.
\n" ); document.write( "IF YOU HAVE TWO POINTS (2,-3)&(5,0) YOU CAN FIND THE SLOPE BY THE FORMULA
\n" ); document.write( "(Y2-Y1)/(X2-X1) THUS
\n" ); document.write( "(0+3)/(5-2)
\n" ); document.write( "3/3=1 WHICH IS THE SLOPE OF A LINE THROUGH THESE TWO POINTS.
\n" ); document.write( "NOW SUBSTITUTE ONE SET OF X,Y POINTS IN THE LINE EQUATION & SOLVE FOR THE Y INTERCEPT (b). THUS:
\n" ); document.write( "-3=1*2+b
\n" ); document.write( "-3=2+b
\n" ); document.write( "b=-3-2
\n" ); document.write( "b=-5 THUS THE FORMULA FOR THIS LINE IS:
\n" ); document.write( "Y=X-5
\n" ); document.write( "THE GRAPH OF THIS LINE FOLLOWS:
\n" ); document.write( " $\"+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+y+=+x+-5%29+\"$ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = x -5). \n" ); document.write( "

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