How to find the acceleration at a given time from the velocity graph

The video tutorial explains that acceleration is the slope of velocity, emphasizing that it remains constant along a linear velocity graph. It demonstrates how to calculate average acceleration using the change in velocity over time, providing a specific example calculation between two points. The tutorial concludes that the acceleration is consistent regardless of the position on the graph.

What does the term 'slope' refer to in the context of velocity and acceleration?

Explain why the acceleration remains constant regardless of the position along the line.