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Finding an Equation Given Two Points

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Title: No Slide Title Author: James Wenk Last modified by: Jim Wenk Created Date: 4/1/2002 10:51:28 PM Document presentation format: On-screen Show – PowerPoint PPT presentation

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Title: Finding an Equation Given Two Points


1
Finding an Equation Given Two Points
y mx b
1
Write the equation of the line which contains
y x b
3
1
5 (4) b
(-2, 3) (4, 5)
3
(x, y)
4
y2- y1
5 b
3
Slope (m)

x2- x1
4
15
4
b 5 -
-

5 - 3
3
3
3
2
Slope (m)


11
4 - -2
6
b
3
1
11
1
y x
m
3
3
3
2
Write the equation of the line which contains
(0, -3) (4, 8)
y mx b
(x, y)
11
y x b
y2- y1
4
Slope (m)

11
x2- x1
8 (4) b
4
8 - -3
11
Slope (m)


4 - 0
8 11 b
4
-11 -11
11
m
-3 b
4
b -3
11
y x - 3
4
3
Use the x-y chart below to write a linear
equation that satisfies all the points.
x
y
y mx b
2 4 4 10 7 19 9 25 14
40
6
2
y 3x b
9
3
10 3(4) b
6
2
10 12 b
15
5
-12 -12
y2- y1
10 - 4
-2 b
m

x2- x1
4 - 2
6
3
y 3x - 2
m

2
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