Posted by Ciscokid on Friday, January 20, 2012 at 2:58pm.
You should have learned that the slope of a line is equal to tanØ, where Ø is the angle that the line makes with the positive x-axis
for #1
slope of that line is 3/2
so tanØ = 3/2
Ø = tan^-1 (3/2)
my calculator gave me appr. 56.3°
do the others the same way
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