Question 466933
The parallel line has to have the form y = -x + c, where c is an undetermined constant.  To find the value of c, use the coordinates of the point.

==> 4 = -4 + c ==> c = 8

==> The equation of the line is y = -x + 8. (Equations for one line are fundamentally the same, so it's up to you to just go from one form to another.)