Hệ số góc của đường thẳng y =ax + b ( a#0 )

HE SO GOC CUA ẹệễỉNG
THANG y = ax + b (

a 0)

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a/ .Theo ủe baứi ta coự:
6 = a.2 +3
6-3 = 2a
3 = 2a
3
a =
2
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a/ .Theo đe àbài ta có:
m-1 0 m 1
m-1 = 1 m = 2
Vậykhi m = 2 thì đồthò
hàmsố y (m 1)x 1
songsongvớiđườngthẳng
y x 5.
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