document.write( "Question 216618: question #6
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Algebra.Com's Answer #163570 by Edwin McCravy(20056) $\"\"$ $\"About$

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find the slope of the line containing the points (-1,4)and (1,-3)
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document.write( "There are two ways:\r\n" );
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document.write( "First way -- the graphical approach:\r\n" );
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document.write( "Plot the two points:\r\n" );
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document.write( "Draw the line between them\r\n" );
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document.write( "From the lower point, draw a line vertically upward \r\n" );
document.write( "until the top of the line is exactly even with the \r\n" );
document.write( "upper point, like the green line below:\r\n" );
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document.write( "Count the number of units the vertical green line is in \r\n" );
document.write( "length by comparing it to the units on the y-axis. We\r\n" );
document.write( "see that it is 7 units in length.  So the numerator\r\n" );
document.write( "of the slope is 7.\r\n" );
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document.write( "Next we draw a horizontal green line from the top of that\r\n" );
document.write( "green vertical line over to the upper point, like this:\r\n" );
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document.write( "Count the number of units the horizontal green line is in \r\n" );
document.write( "length by comparing it to the units on the x-axis. We\r\n" );
document.write( "see that it is 2 units in length.  Also the fact that the \r\n" );
document.write( "horizontal line was drawn to the left, the denominator\r\n" );
document.write( "of the slope is taken to be negative.  So the denominator of\r\n" );
document.write( "the slope is -2, so the slope is\r\n" );
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document.write( "  or\r\n" );
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document.write( "Second way -- the formula approach:\r\n" );
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document.write( "Use the formula \r\n" );
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document.write( "where \r\n" );
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document.write( " and \r\n" );
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document.write( "Edwin

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