Question 896422
135 degrees is more than a right angle but
less than 180 degrees
{{{ 135 = 90 + 45 }}}
This is an angle in the 2nd quadrant. The slope 
is the tangent of the angle:
{{{ tan( 135 ) = 1/(-1) }}}
{{{ tan( 135 ) = -1 }}}
The slope is -1