document.write( "Question 410367: use the slope intercept form to graph the equation 5x+y=-1 \n" ); document.write( "
Algebra.Com's Answer #288596 by Edwin McCravy(20054)\"\" \"About 
You can put this solution on YOUR website!
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document.write( " 5x + y = -1\r\n" );
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document.write( "Solve for y by adding -5x to both sides:\r\n" );
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document.write( " 5x + y = -1\r\n" );
document.write( "-5x       -5x\r\n" );
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document.write( "      y = -5x - 1\r\n" );
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document.write( "Compare to\r\n" );
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document.write( "      y = mx + b\r\n" );
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document.write( "The slope is m = -5 and the line intercepts the y-axis at b = -1.\r\n" );
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document.write( "Plot the y-intercept on the y-axis at -1.\r\n" );
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document.write( "                                                  -5\r\n" );
document.write( "Since the slope is -5, we write it as a fraction ———— \r\n" );
document.write( "                                                   1\r\n" );
document.write( "From the y intercept we draw a vertical line the\r\n" );
document.write( "number of units indicated by the numerator of the slope, which\r\n" );
document.write( "is -5.  Since it is negative we draw the vertical line DOWNWARD.\r\n" );
document.write( "I'll draw it in green:\r\n" );
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document.write( "(when the slope is positive we draw the line UPWARD from the y-intercept.)\r\n" );
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document.write( "From the end of that line, we draw a horizontal line to the\r\n" );
document.write( "right which is the number of units long indicated by the \r\n" );
document.write( "denominator, which is 1.  So we now have:\r\n" );
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document.write( "Fionally get a ruler and draw a line through the y-intercept and\r\n" );
document.write( "the end of the horizontal green line:\r\n" );
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document.write( "That's the graph.\r\n" );
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document.write( "Edwin
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