This is looking north on 19 block Scarth near the south-east corner of Victoria Park. I didn’t have a protractor with me, but I’d estimate the slope of the sidewalk by the tree to be around five degrees.
Actually, the whole stretch of sidewalk up to at least mid-block is a mess. You can see another bad spot after the jump — and at the top you get a good sense of the slope in the first shot. Click both pictures to enlarge.