document.write( "Question 1207773: Find the slope of the line that contains the points (-6, -9) and (-10, -8).
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Algebra.Com's Answer #845845 by math_tutor2020(3817)\"\" \"About 
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\n" ); document.write( "There are two basic approaches. \r
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\n" ); document.write( "\n" ); document.write( "One approach is to use the slope formula.
\n" ); document.write( "m = (y2-y1)/(x2-x1)
\n" ); document.write( "m = (-8-(-9))/(-10-(-6))
\n" ); document.write( "m = (-8+9)/(-10+6)
\n" ); document.write( "m = 1/(-4)
\n" ); document.write( "m = -1/4
\n" ); document.write( "Notice we subtract y coordinates up top, and subtract x coordinates down below.
\n" ); document.write( "Be sure not to mix up the order of x1 and x2 for instance, or else you might get an erroneous positive result.\r
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\n" ); document.write( "\n" ); document.write( "Another approach would be to plot the two points.
\n" ); document.write( "Start at the left-most point (-10,-8).
\n" ); document.write( "Then move down 1, and right 4 to arrive at (-6,-9)
\n" ); document.write( "rise = -1 = means go down 1
\n" ); document.write( "run = 4 = go right 4
\n" ); document.write( "slope = rise/run = -1/4
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