Final answer:
Electronic Health Records (EHR) is the tool used to make seeing trends in populations of patients easier.
Step-by-step explanation:
The tool used to make seeing trends in populations of patients easier is Electronic Health Records (EHR). EHRs are digital records that contain a patient's medical history, diagnoses, medications, and other important information. They can be accessed and shared by healthcare providers, improving coordination of care and making it easier to identify trends and patterns in patient populations.