document.write( "Question 90378: How can I Find the slope of the line passing through the points (–2, 1) and (3, 9). and show in a graph? thank you in advance for your help \n" ); document.write( "
Algebra.Com's Answer #65623 by checkley75(3666)\"\" \"About 
You can put this solution on YOUR website!
THE SLOPE IS FOUND BY (Y2-Y1)/(X2-X1). THUS:
\n" ); document.write( "(9-1)/(3+5)=8/8=1 WHICH IS THE SLOPE OF THE LINE PASSING THROUGH THESE 2 POINTS.
\n" ); document.write( "1=1*-2+b
\n" ); document.write( "1=-2+b
\n" ); document.write( "b=1+2
\n" ); document.write( "b=3
\n" ); document.write( "thus we have the line equation of: y=x+3
\n" ); document.write( "now we need to find the y intercept by substituting one set of point x & y values into the line formula [Y=mX+b] and solve for b which isthe y intercept:\r
\n" ); document.write( "\n" ); document.write( "GRAPH FOLLOWS: \"+graph%28+300%2C+200%2C+-10%2C+10%2C+-10%2C+10%2C+y+=+x+%2B3%29+\" (graph 300x200 pixels, x from -10 to 10, y from -10 to 10, y = x +3).
\n" ); document.write( "
\n" );