Control, Joint Control, Significant influence

Can you please check if my understanding is correct?

1. Control:
– need to have both power and variable return
# if achieve control, means it is a subsidiary, and need to consolidate the subsidiary.

2. Joint control:
– when control not achieved,
– ‘contractually agreed sharing of control of an arrangement, which only exist when decisions about the relevant activities require unanimous consent of the parties sharing control.
# if achieve joint control, means it is a joint venture, account using IAS 28

3. Significant influence:
– test when both control and joint control are absence
– power to participate in financial and operating decisions
# if significant influence, means it is an associate, account using IAS 28

4. Financial asset
– test when control, joint control, and significant influence are not existed

Much appreciated.