Order the correlation by how confident you can be that a predicted value will be close to the actual value. Order those from most confident to least confident.
1. r = 0
2. r = -0.8
3. r = 0.5
4. r = -0.3
5. r = 0.7
The order from most confident to least confident would be:
1. r = 0.7
2. r = 0.5
3. r = -0.3
4. r = -0.8
5. r = 0