I think I figured it out!
First, I added a thin line in the hoop.
When the ball passes over the line, it adds a value of 5 to my variable MakeBasket, which has a starting value of 0.
Right below that line, I have another thin line that adds another value of 5 to the variable.
I added a new event that looks for the MakeBasket variable to have a value of 10. If it does, then it registers a basket.
To keep it from adding a point when the ball travels in the opposite direction, I used gamecorpstudio's advice and made the bottom line a solid, until the ball is currently in contact with the top line.
Works like a charm! Thanks for all your help