well they y intercept is good, but use your head, test a few points is one way
ok, so you have (0,1), tha tworks
but, you have (1,2)
if we subsituted that we get 2=-2(1)+1 or 2=-2+1 or 2=-1, false
you should put a point at (1,-1)
and connect them
also, the slope is negative so you should have it going down to the right
the equation you graphed is y=x+1
the correct graph is below