Speed Change Visualization

I need a graph that illustrates the change in speed over time using my time series data. The data is currently in an Excel spreadsheet, and I also use MongoDB for storage.

Requirements:
- Transform time series data from Excel into a visual format.
- Create an accurate and clear graph showing speed changes over time.
- Experience with Excel and data visualization.
- Familiarity with MongoDB is a plus.

Ideal Skills:
- Data visualization
- Proficiency in Excel
- Experience with MongoDB