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Linear equation
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Slope–intercept form of linear equation
y
=
m
x
+
b
Slope
m
=
t
g
α
Intercept form of linear equation
x
a
+
y
b
=
1
General form of linear equation
A
x
+
B
y
+
C
=
0
Normal Vector
n
→
(
A
,
B
)
Direction Vector
v
→
(
−
B
,
A
)
Equation of a Line from 2 Points
y
-
y
1
x
-
x
1
=
y
2
-
y
1
x
2
-
x
1
Angle between two lines
l
1
:
y
=
m
1
·
x
+
n
1
l
2
:
y
=
m
2
·
x
+
n
2
t
g
φ
=
m
2
-
m
1
1
+
m
1
·
m
2
Keywords: Linear equation
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