Answers

2016-04-21T11:29:03+08:00
M= y₂-y₁÷x₂-x₁
m = -4-(-5)÷7-(-1)
m= 1/8 (slope)

tan  \alpha  = m
tan  \alpha  = 1/8
 \alpha  = Arctan (1/8)
 \alpha = 7.13° (angle of inclination)
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