Data Selection:

The code filters the DataFrame (final_df) to include only records associated with the ‘Boston Police Department’.

Data Aggregation:

The total gross earnings for the Boston Police Department are then aggregated for each year.

Plotting:

A line plot is created to visualize the trend in total gross earnings over the years.

The x-axis represents the years, and the y-axis represents the corresponding total gross earnings.

Each data point on the line plot is marked with a circular marker (‘o’).

Interpretation:

The plot provides a visual representation of how the total gross earnings of the Boston Police Department have changed over the years.

Observing the trend can offer insights into patterns of financial growth, fluctuations, or other relevant information related to earnings.

Boston Fire Department Earnings Trend:

The plot illustrates the annual total gross earnings trend for the Boston Fire Department, showing fluctuations and overall financial patterns.

BPS Substitute Teachers/Nurs Earnings Trend:

The plot depicts the yearly total gross earnings trend for BPS Substitute Teachers/Nurs, capturing variations and