Running totals and rates of change answer different questions: how much has...

https://lorenzosimpressiveinsights.wordcanopy.com/posts/how-do-i-choose-between-a-discrete-model-and-a-continuous-model

Running totals and rates of change answer different questions: how much has built up, and how quickly is it changing? With parcel deliveries, compare parcels per day with total parcels over a week