Question 44525
(a) The equation of the line through (0,0) which is perpendicular to y = x is y = -x
1.IT SATISFIES 0,0...
2.SLOPE=-1/1=-1..OK....TRUE
(b) The line 2x – y = -1 goes through the point (-2,-3)
SUBSTITUTING 
LHS=2*-2-(-3)=-4+3=-1=RHS....TRUE