Question

find the angles made by the line joining [5,3]and[-1,-3] with the positive direction of X-axis

Answer 1

m is slope =(y2-y1)/(x2-x1)
m= -3-3/-1-5=-6/-6=1
m=1
m=tanø =1
ø=45°

Answer 2

Hope this helps you...
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X is slope =(y2-y1)/(x2-x1)
X= -3-3/-1-5=-6/-6=1
X=1
X=1
=45°