Posted by math help on Tuesday, August 28, 2012 at 6:33am.
the graph line passing through (1,1) , (2,4) make with positive xaxis angle equal is:
a) 30 degree
b) 45 degree
c) 60 degree
d) 135 degree

Math  Reiny, Tuesday, August 28, 2012 at 8:09am
slope = (41)/(21) = 1
If Ø is the angle that the line makes with the xaxis, then
tanØ = 1
Ø = 135°
(draw the line to verify)