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Calculator check
Upper
Upper left y= button
button
(are any “Plot” dark?Unselect them) Write
Write equation 2x—5
X button is to right of alpha key
(—) is for negative numbers
Use the operator — in right column
Press
Press graph: upper right
Zoom: 6, zoom 5 to center on origin and make
square
Trace: 4 [enter] will show x=4, y=3 and flash Find
Find equation from slope and point
2
−
Sl
Slope = 5
Point (—4, 1)
Put m, x and y in
Find b
3
−
b= 5
Equation
Equation of the line:
put in m and b y = mx + b 2
1 = − (−4) + b
5
2
3
y =− x−
5
5 Slope
Orientation of a line
li
change in y divided by
change in x
(0, 5), (2, 0)
Find from points y2 − y1
m=
x2 − x1 Equation
Equation from two points
Fi
Find slope y2 − y1
m=
x2 − x1 Find the yintercept using slope and one
of the points
Substitute m and b into slopeintercept
equation y = mx + b 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 Parallel
Parallel lines
Have the same slope
th
But contain different points
Write in slopeintercept form to find
slope y = mx + b Find
Find equation from slope...
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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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