A simple way to find points is plugging numbers into x and getting y. For example:
y = -9/5(5) - 9
y = -9 - 9
y = -18
So, your points for this example would be (5, -18)
Also, I know this isn't on the graph, but finding 5 points on this aren't always exactly on the point, but here are five points anyway:
(0, -9), (-5, 0), (-10, 9), (-1, -7.2), and (2, -12.6).