Investigate by calculating which of the points

a) [[$ (1, 2) $]], [[$ (2, 6) $]] and [[$ (4, 5) $]] are on the line [[$y = x + 1$]]



The points () and () are on the line.

b) [[$ (-3, -1) $]], [[$ (3, -5) $]] and [[$ (-1, -1) $]] are on the line [[$y=\:–x\:-2$]]



The points () and () are on the line.