You run a web$-$based billing application for a utility company and are moving it to the cloud. You've identified there's always a spike in logins on the last weekday afternoon of the month as people enter their meter self$-$readings on the site. You've decided to scale up available resources only on that day to save money during the rest of the month. What kind of trend analysis probably gave you that insight?

Pattern

Anomaly

Baseline

Forecast