Question 333739
y=3-x
..
(1,2)... x=1, y=2
(2,1)
(3,0)
(-1,4)
(-2,5)
(0,3)
From the various points obtained by plugging the values of x in the equation 
The line intercepts the x & yaxis at x=3 & y=3.
The line forms an isoscles triangle with the axes.
So the angle will be 45 deg


{{{graph(200,300,-5,5,-5,5,3-x)}}}