document.write( "Question 59901: how do you find the rate of change with two given points and then tell the classification of the line?
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Algebra.Com's Answer #41201 by tutorcecilia(2152)\"\" \"About 
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The rate of change is the slope or the \"slant\" of the line.
\n" ); document.write( "(y1-y2)/x1-x2) [The slope formula]
\n" ); document.write( "Given points (1,2) and (3,4)
\n" ); document.write( "Slope=m=(2-4)/(1-3) [Plug-in the values for y1, y2, x1, and x2; and solve]
\n" ); document.write( "Slope=m=(2-4)/(1-3) =-2/-2=1\r
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\n" ); document.write( "The sign (positive or negative) of the slope determines whether it is a postive or negative slope:
\n" ); document.write( "Example: m = -2 is a negative slope
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\n" ); document.write( "\n" ); document.write( "Example: m=+2 is a positive slope
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