In the context of the average user rating being 45, an outlier is a data point that significantly differs from the rest of the data. The possible ratings provided are:
- 36
- 45
- 48
- 100
The values 36, 45, and 48 are relatively close to the average rating of 45, while 100 is significantly higher than the average and stands out from the other values. Therefore, the rating that is MOST LIKELY an outlier is 100.