Hey Guest!
Here is an ordinary polar graph:
It is like an ordinary x-y coordinate graph, but the x is wrapped around in a cicle.
You can first graph the x or the y, it doesn't matter.
For ( 5, 240°), let's just say we first graph 5. If you look at the arrow, there is a 5 between the 4 and 6.
It is the degrees that determines the specific point.
Then, we find the 240° line, then find the intersection of the 5 circle and the 240° line.
You can try (-1, 120°) on your own.
I hope this helped,
Gavin.