if statement not working

[Larz60+]

To make the initial input look somewhat better, i'd change it to:

x = input("There are three modes to this game: quadratic, interest, and order of operations. Type:"
          "\n    'q' for quadratics\n    'i' for interest\n    'o' for order of ops\nYour choice: ")

so it looks like:

Output:
There are three modes to this game: quadratic, interest, and order of operations. Type:
    'q' for quadratics
    'i' for interest
    'o' for order of ops
Your choice: