Parallel m1 m2 perpendicular m1m2 1 or m2 1 m1 note

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Unformatted text preview: problem; in fact, we can use these two points to determine the missing slope of the line since we do know that we can always find that from any two points on the line. © 2007 Paul Dawkins 163 College Algebra So, let’s start off my finding the slope of the line. m= -5 - 4 9 =3 - ( -2 ) 5 Now, which point should we use to write down the equation of the line? We can actually use either point. To show this we will use both. First, we’ll use ( -2, 4 ) . Now that we’ve gotten the point all that we need to do is plug into the formula. We will use the second form. y = 4- 9 9 ( x - ( -2 ) ) = 4 - 5 ( x + 2 ) 5 Now, let’s use ( 3, -5 ) . y = -5 - 9 ( x - 3) 5 Okay, we claimed that it wouldn’t matter which point we used in the formula, but these sure look like different equations. It turns out however, that these really are the same equation. To see this all that we need to do is distribute the slope through the parenthesis and then simplify. Here is the first eq...
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This note was uploaded on 06/06/2012 for the course ICT 4 taught by Professor Mrvinh during the Spring '12 term at Hanoi University of Technology.

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