document.write( "Question 247793: problem rate of change and slope algebra 1 chapter 4 glencoe algebra problem i need to be solve here goes find the slope of the line that passes through each pair of points (4,9),(1,6) (-4,-1),(-2,-5) (1,-2), (6,2) (4,3.5),(-4,3.5) \n" ); document.write( "
Algebra.Com's Answer #180649 by richwmiller(17219)\"\" \"About 
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slope m is m=(y1-y2)/(x1-x2)
\n" ); document.write( "where y1 is the first y and y2 = the second y
\n" ); document.write( "where x1 is the first x and x2 = the second x
\n" ); document.write( "(4,9),(1,6)
\n" ); document.write( "(-4,-1),(-2,-5)
\n" ); document.write( "(1,-2), (6,2)
\n" ); document.write( "(4,3.5),(-4,3.5)\r
\n" ); document.write( "\n" ); document.write( "be sure to pay attention to the signs and make sure you are plugging in y's and x's
\n" ); document.write( "minus a minus is plus
\n" ); document.write( "x is before the comma and y is after the comma
\n" ); document.write( "so for the first set of points
\n" ); document.write( "remember y's on top\r
\n" ); document.write( "\n" ); document.write( "(9-6)/(4-1)
\n" ); document.write( "second
\n" ); document.write( "[-1-(-5)]/[-4-(-2)]
\n" ); document.write( "third
\n" ); document.write( "[-2-2]/(6-1)
\n" ); document.write( "fourth
\n" ); document.write( "[3.5-3.5]/[4-(-4)]\r
\n" ); document.write( "\n" ); document.write( "what does a zero in the numerator mean? no slope =horizontal line
\n" ); document.write( "what does it mean when there is a zero in the denominator? undefined slope= vertical line
\n" ); document.write( " \n" ); document.write( "
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