Unformatted text preview: and point
Sl
Slope = m
Point (x, y) right?
Put m, x and y in
Find b
Equation of the line:
put in m and b y = mx + b Perpendicular
Perpendicular lines
Have the opposite reciprocal slope
th
Invert fraction notation of slope
Change sign 2
m1 = −
2
3
5
y =− x−
5
5
5
m2 = +
2 Find
Find equation from slope and point
Sl
Slope = m
Point (x, y) right?
Put m, x and y in
Find b
Equation of the line:
put in m and b y = mx + b Point
Pointslope form of line y2 − y1
m=
x2 − x1 Thi
This is the slope equation
th
If you know a point,
call it point 1
Point 2 will be the generic variables of
the equation: drop off the 2 from x and y
Multiply both sides by (x2—x1) to get (y — y1 ) = m (x — x1 ) Put in known point and slope Computer
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Course ID is brown26127
ID
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This document was uploaded on 02/25/2014 for the course MATH 095 at Western Oregon University.
 Spring '11
 K.Brown
 Algebra, Linear Equations, Equations, Slope

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