Microsoft Exam DP-100 Topic 5 Question 4 Discussion

Coefficient of determination, often referred to as R2, represents the predictive power of the model as a value between 0 and 1. Zero means the model is random (explains nothing); 1 means there is a perfect fit. However, caution should be used in interpreting R2 values, as low values can be entirely normal and high values can be suspect.

References:

https://docs.microsoft.com/en-us/azure/machine-learning/studio-module-reference/evaluate-model