Asked by math help
the graph line passing through (1,1) , (-2,4) make with positive x-axis angle equal is:
a) 30 degree
b) 45 degree
c) 60 degree
d) 135 degree
a) 30 degree
b) 45 degree
c) 60 degree
d) 135 degree
Answers
Answered by
Reiny
slope = (4-1)/(-2-1) = -1
If Ø is the angle that the line makes with the x-axis, then
tanØ = -1
Ø = 135°
(draw the line to verify)
If Ø is the angle that the line makes with the x-axis, then
tanØ = -1
Ø = 135°
(draw the line to verify)
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