document.write( "Question 897416: 120x-2y=9000
\n" ); document.write( "x int (75,0)
\n" ); document.write( "y int (0,-4500)\r
\n" ); document.write( "\n" ); document.write( "How do I use the formula y=mx+b to graph the function?\r
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\n" ); document.write( "\n" ); document.write( "Thanks in advance! \n" ); document.write( "
Algebra.Com's Answer #544142 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
You plot the y-intercept, (0,b).
\n" ); document.write( "Then you use the slope, m, to calculate the next point.
\n" ); document.write( "In your example,
\n" ); document.write( "\"-2y=-120x%2B9000\"
\n" ); document.write( "\"y=60x-4500\"
\n" ); document.write( "The slope, \"m\", is equal to 60.
\n" ); document.write( "The y-intercept is (0,-4500).
\n" ); document.write( "So for every 60 unit change in y, there is 1 unit change in x.
\n" ); document.write( "So if x changes by 10 units, y changes by 600 units.
\n" ); document.write( "So then another point on the line is (starting at the y-intercept),
\n" ); document.write( "(0,-4500)+(10,600)=(10,-3900)
\n" ); document.write( "You can then plot that point.
\n" ); document.write( "Now you have two points, you can draw the straight line containing both points.
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