Let's say we have a graph, a distance-time graph, and there are couple points on the graph. The points are connected to each other with different slopes, so with different speeds between the points.
What is the correct way of calculationg speed?
Subtract the initial distance from the final distance from the whole graph and divide by time.
Subtract the initial distance from final distance of each segment of speed. Then divide each segment difference by time, abd average them all together.
I keep insisting on method 2 and my teacher on method 1. Which is more correct? By the way they produce similar but different results.