document.write( "Question 1069958: What is the slope intercept form of (2,1) (-5,-8)? \n" ); document.write( "
Algebra.Com's Answer #685081 by rothauserc(4718)\"\" \"About 
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the slope of a line through two points is defined as
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\n" ); document.write( "slope(m) = (y(2) - y(1)) / (x(2) - x(1))
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\n" ); document.write( "let (2, 1) be (x(1), y(1)) and ((-5, -8) be (x(2), y(2))
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\n" ); document.write( "m = (-8 - 1) / (-5 - 2) = -9 / -7 = (9 / 7)
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\n" ); document.write( "so far we have
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\n" ); document.write( "y = 9x/7 + b
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\n" ); document.write( "we can use either point, so lets pick (x(1), y(1))
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\n" ); document.write( "1 = (9(2)/7) + b
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\n" ); document.write( "b = 1 - (18/7) = (7/7) - (18/7) = (-11/7)
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\n" ); document.write( "slope intercept form is y = (9x/7) - (11/7)
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