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Unformatted text preview: ious part let’s first
3 In this case the slope is - determine the rise and the run. m=- 4 -4 rise
3 3 run Þ rise = -4, run = 3 Again, remember that if the slope is negative make sure that the minus sign goes with the
numerator. The second point is then, x2 = 0 + 3 = 3 y 2 = 2 + ( -4 ) = -2 Þ ( 3, -2 ) Here is the sketch of the graph for this line. [Return to Problems] The final topic that we need to discuss in this section is that of parallel and perpendicular lines.
Here is a sketch of parallel and perpendicular lines. © 2007 Paul Dawkins 166 http://tutorial.math.lamar.edu/terms.aspx College Algebra Suppose that the slope of Line 1 is m1 and the slope of Line 2 is m2 . We can relate the slopes
parallel lines and we can relate slopes of perpendicular lines as follows. parallel : m1 = m2
perpendicular : m1m2 = -1 or m2 = - 1
m1 Note that there are two forms of the equation for perpendicular lines. The second is the more
common and in this case we usually say that m2 is the negative rec...
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- Spring '12